IssueTracker

I am also reporting the same issue for my Chromebook - same model as the post above.   I've had the same problem on 2 chromebooks.

I too have an Acer 14 (4 weeks old) with the problem. It only happens,
however, with high data rates (eg U Tube). Talked to Acer. They said it was
my HDMI monitor or HDMI cable. Not so. I don't know whether it is a
hardware problem or a Chrome OS problem. I have version 55.

George K

I am reporting the same issue on an Acer R11 in "docked mode" with a LG monitor and a ViewSonic monitor when connecting to each via HDMI.

I am reporting the same issue on Lenovo N22 chromebook connected to Asus monitor VE228 via HDMI cable.

#CBC-RS/TC-watchlist

Having the same exact issue with an Acer Chromebook and a viewsonic HDMI monitor.

Samsung 500C

Same issue. Acer Chromebook R11. Tried 2 different R11 Chromebooks, 2 different monitors, and 3 different HDMI cables. Clearly there's a bug in need of a fix. Google this, and you'll find 100's of complaints about it.

Same issue. Lenovo N22. Very frustrating.

Version 55.0.2883.105 (64-bit)

Mozilla/5.0 (X11; CrOS x86_64 8872.76.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.105 Safari/537.36

Misery loves company, so I thought I would post this reminder that it's a worldwide bug in the code causing a problem faced by all chromebooks everywhere. Google it and you'll find 100's of complaints, or read about some of your fellow bug victims here:


https://productforums.google.com/forum/#!topic/chromebook-central/_LXVSwVeaQ8;context-place=forum/chromebook-central 

https://productforums.google.com/forum/#!topic/chromebook-central/WGW6CJFSFzY;context-place=topicsearchin/chromebook-central/r11$20hdmi 
 

Tagging appropriate label.
Requesting ChromeOS logs, if anyone here can also assist with that it would be much appreciated.

Hi all,

Here's the link to the logs while reproducing the issue. It's Google restricted https://drive.google.com/a/google.com/file/d/0Bxg-rTzA58Peam5RRmlnWm1CaHc/view?usp=sharing

Thanks!.

Is this issue reproducible at ver 56 on a beta channel?  

I just reproduced it on beta channel v56.0.2924.67. I have an Acer R11.

Don't know if this is the same for others, but I've actually found a way to reproduce it quite quickly, instead of waiting a random amount of time:

- Attach Chromebook to external monitor through HDMI
- Close the Chromebook to go into docked mode
- Now quickly and repeatedly use your mouse to click anywhere on the screen and simultaneously press the ESC key on your keyboard repeatedly.
- The screen should black out after a short amount of time (under 30 seconds) of doing this.

I have this problem with an entire fleet of Acer R11 and we really need this fixed really soon.

#CBC-RS/TC-watchlist

I also have this issue. My Samsung TV goes off if I pause video I'm streaming and my Acer 14" chromebook is closed. I have an external Bluetooth mouse and keyboard. If I open the chromebook and hit play, I get audio from the TV but no picture. The only way to get the picture back onto the TV is to restart my chromebook. At this point, I have to open the chromebook every time I want to pause a streaming program. Sigh.

This just started happening for me on my Acer 14 as well over the past week. Happens even when not in docked mode (using both the laptop monitor and extending to the external monitor). The external will go black (but still be on) and the laptop continues to think it is connected to the external. Restarting restores the dual connection.

I also have a Lenovo N22-20 80VH (Lenovo distinguishes between 80
& non-80 models so I figure I should, too.)

I'm rather new to Chromebooks, but been building, fixing, using micros since 1979. I'm glad to see I'm not alone with this @ 20 minute blanking of an external monitor when i Docked mode.

I have had this happen whether I am in Stable, Beta or Developer channels and also Dev Mode. (I Powerwash a lot)

One time it ran for about 3+ hours before blanking. I *think* I was listening to music on my SD Card; I will try + various combos again now that I know so many others around the world are also experiencing this issue.

I did send a bug report a couple of days ago with screenshots. One thing I found interesting was it took two screenshots labeled Display 1 and Display 2. Even with the external monitor blank, the screenshot showed the background picture.
I may have been in extended mode at that time--probably was so I would have a screen to see.  :)

Good Luck!

Issue on Stable Channel -- Acer R11 CB5-132T-C1LK
Version 55.0.2883.105 (64-bit)
Platform 8872.76.0 (Official Build) stable-channel cyan
ARC Version 3617689
Firmware Google_Cyan.7287.57.92

HP 27ea directly connected with HDMI cable, using USB keyboard and mouse -- only app running is Chrome in full screen mode with 6 tabs open

FYI - I've found that not running the browser full screen was a good
workaround for me.  I can run maximized and don't have any trouble, but as
soon as I run the browser full screen, and then try to move another window
or tear off a tab, the screen blanks.  That may help you until they get it
fixed.  J

John B. Kendrick
cell/text 443-862-0125

Sent from Google Mail . . .

I ran for 3-6 hours in Docked Mode the last couple of days... by having a game up.
Version 56.0.2924.87 (64-bit)
Platform 9000.82.0 (Official Build) stable-channel reks
ARC Version 3691121

1. I was on Beta Channel in Dev Mode to run Android apps and had "Jewels 2 Free" up. I played it for about 3 hours while in Extended Monitor, then closed the lid (Docked mode). The external monitor went blank after @ 20 minutes.

2. I Powerwashed back to the Stable channel and No Dev Mode so no Android apps (still). I tried "Bejeweled Classic"--and could not! Sometime yesterday it was removed from the Chrome Web Store and searches for Bejeweled and Popcap (the software company) come up empty.
BUT, I found it online as an HTML5 game at Archive.org:
https://web.archive.org/web/20160303143714/http://bejeweled.popcap.com/html5/0.9.12.9490/html5/Bejeweled.html

I played it for over an hour in Extended Monitor mode (Chromebook screen open, but I turned down the brightness and closed it most of the way so it would not distract me).
I closed the lid, Docked Mode, and played it for another hour--Yes!
I clicked on Menu toward the bottom left (it shows the sound levels, quit or go back to game functions) and went to bed.
I woke a few hours later and it was still on, now over 5 hours and still going.
I woke later to get up for the day and... the screen was blank, because... I forgot to plug in the power pack.

So, I went back to Archive.org and have Bejeweled sitting in another window as I read email and send this report. It's been about 20 minutes and it is still going. My guess is that there is some code in the game that is better than the 'keep alive' extension.

Maybe you want to try bringing up the game and see it that helps your Chromebook keep working while Docked?

I am having the same issue with an HP CB (HP 11 G4 P0B78UT#ABA)

I have it connected via HDMI to a Dell monitor.  When I close the CB it goes into docking mode. After some amount of time the Dell goes black but the CB thinks its still connected to the Dell monitor.  The monitor does not report "no signal" so its getting a signal, but the screen is just black.  Only way to fix it is to restart the CB.

Thanks

I have made some video evidence of the issue.

It will happen at 3 minutes this time, but it can sometimes be 20 minutes before it happens.

Notice how the screen will flicker, when both mouse and keyboard are used.

https://goo.gl/photos/dwcJ9vsdbUFBEEbJ9

I'll just quickly add, that this only happens with 1080P. If I set the resolution lower or switch to a lower resolution monitor, clam mode will work just fine.

@26: this bug is about edgar, and this video doesn't show an edgar, it's a different chromebook. You will have to file a separate bug.

I can't reproduce this on M58/ToT. It might have been fixed by the watermark reverts.

We are also now experiencing this same issue with chromebits.  Only a complete restart will get the units back running and alive

Over the past two days I have been trying to force the screen to blank and no I cannot. I tried having just email open and left the computer alone. After 15 minutes, the monitor went to sleep. After another 45 minutes I moved the mouse and the monitor came back on.

So I tried overloading the CPU--not too difficult for an Intel N3060. I had 5 YouTube videos playing, each in their own small window, 2 emails open with one being the Outlook.com Chrome app, plus a few browser tabs including this site and also Docs open where I am typing in what I did & when & results. All the results of leaving the CB alone was the monitor going to sleep after 15 minutes.
Except one. I had all this running and grabbed some breakfast. I checked it @ 10 minutes later and everything was running. But after I finished eating and returned, I was greeted with the logon screen. I logged in and the music came up waiting for me to hit Play. There was one Chrome window minimized.

    * * * And the monitor just went blank   * * *

I just have Gmail, Outlook.com, the audio player and this window open. (as for the minimized Chrome window, it had the yellow bar about it unexpectedly closing and I let it open the tabs; it did)

So, I seem to experience the blanking more when I am typing. I am starting to wonder if it is a "Buffer Overflow" issue with the external keyboard. I'll rearrange my setup where I can use the CB's keyboard, instead.

DU! I'm definitely getting whippy from all this testing (and thinking if what to try next). There's no way to use the CB's keyboard when in Docked mode because... the CB is closed.

But, I did realize that typing in web sites and in Gmail, they are all in the Chrome browser. That's the only common point I can see right now. So now to try doing stuff without using Chrome.

Same issue here. Acer Chromebook R11 connected to an LG ultrawide display.
It may happen anytime when mirroring (in the first couple of minutes or after 2 hours). Sometimes the screen just flickers and then stabilizes, other times it flickers and just goes blank. Rebooting the chromebook rarely helps. At first I thought this was a cable problem. Replaced the HDMI cable but the error persists.

Same prob. monitor turns off - then come on again - the whole thing lasts only a couple of seconds.
Another thing is that af update 56.0.2924.87 my chromebook (dell chromebook 13, 7310, core i3) is very laggy when I boot up or change user.

I was informed last night by Gabriel at Chrome Unboxed do com that the fix has been pushed out. I downloaded it and ran my Chromebook for over an hour in docked mode without it blanking. It did flicker at least three times, but it kept displaying.

The fix is:
Version 56.0.2924.101 (64-bit)
Platform 9000.87.0 (Official Build) stable-channel reks

If you have the Samsung Chromebook Plus. the last digits will be 104.
(Now to get past I'm Not a Robot....)

Well, my external Docked monitor just blanked out again.

I finished a lot of emails, a couple of dozen articles on various sites and had only one window open. I was writing an eBook review on Amazon.com. I was all but finished with it when the external monitor blanked.  :(

'Up time' was over 4 hours. The screen did flicker at least two times that I noticed.

Just updated the OS to:

Version 56.0.2924.101 (64-bit)
Platform 9000.87.0 (Official Build) stable-channel setzer
ARC Version 3731316
Firmware Google_Setzer.7287.298.0

And I am still getting blank monitor in docking mode.  Instead of the screen being black, its now blue.  But it's still the same issue.  Didn't take more than a minute or two for it to happen.  CB is connected to external DELL 2405FPW monitor via HDMI, have external wireless keyboard and mouse connected via USB dongle.  Was watching youTube video in full screen when screen went blank.  This bug has not yet been fixed.  Just sent log files via alt-shift-i.

Thanks.

Yeah, it didn't fix my issue either. If I'm watching a video, in full
screen mode while in docked mode, and I pause the video, my external screen
instantly goes gray. It was a mottled black before the update now a light
gray. I'll reproduce and send via the send problems prompt.

Oh, well, I take it back. The update does seem to have fixed the problem. I
expected to immediately reproduce it but I haven't been able to yet. Which
it great!

I performed the update and my issue is now I get a solid blue screen only after about 5 minutes. A screen capture will show the background on both monitors, but the external monitor is useless. This is not resolved for me.

In my previous comment from today, I mentioned that I was watching video in full screen mode.  However, it just happened again and I was not in full screen mode.  And it will happen within 30 seconds of going into docking mode.  I can make it happen every time.  Already sent in log files.  If you need anything else please let me know.  Also...is this issue still being tracked, now that it has been marked as "fixed"?  Or, do we need to start a new issue?

Thanks

Reopening issue due to several reports above.

@45: these reports are for different devices than the original one, which was fixed. please open separate issues, otherwise things get conflated and it becomes impossible to investigate.

Still able to reproduce this issue on 9000.89.0_edgar_recovery_stable build.

Steps:
1. Sign in to the device.
2. Plug USB keyboard and mouse to the device.
3. Connect external display using HDMI to HDMI cable.
4. Close lid to enter into docked mode.
5. leave the device to suspend.
6. wakeup the device using USB keyboard/mouse
          or
    Open lid to exit from docked mode.

Result: Sometimes external monitor is not working.

Logs are present at https://pantheon.corp.google.com/storage/browser/chromiumos-test-logs/bugfiles/crosp/677332/?debugUI=CLOUD

son...@google.com,
Mine is not a different device, it is still my Lenovo N22-20 Touchscreen Chromebook. It still has blanked over the last few days; sometimes after 4+ hours, sometimes after 20 minutes. I could be watching to a YouTube video or doing email or surfing the net, it is random.
BUT, the screen does flicker 1 - 3 times at various intervals before it blanks.

I have tried other builds including Canary last night (which would not get me the Play Store even using the crosh commands, but that is a separate matter and was reported).

I went back to Stable channel this morning and it is at .87 instead of the .101 build I had on Stable Channel before trying the other channels + Dev Mode when the .101 build failed.

  FyI,
  BoB

Happened again this morning, while just viewing a web page.  And, these reports are  for different devices.  However, this issue is the same across all (or most) of these cases.  In docking mode, you are obviously going to have an external keyboard and mouse connected...right?  And some external monitor connected.  That's going to be the same for everyone.  There are some reports with HP monitors, mine is a Dell monitor, various hardware platforms (HP, Lenovo, Acer, Samsung)...but the common denominator across all these reports is the Chrome OS.  That pretty much points to the OS being the issue.  Do you really want separate issues created for every possible "device" permutation?  That WILL create more confusion and conflation".  Sent in my logs.  This issue has not been fixed.

I am also a developer.  And if I had to guess, I would say the issue is in the driver for the HDMI port.

Having the same problem, brand new Samsung Chromebook 3 (XE500C13-K02US). Had this issue in stable mode then switched to developer mode and the issue remains :(
Version 58.0.3007.0 dev (64-bit)
Platform 9280.0.0 (Official Build) dev-channel celes
ARC Version 3725293
Firmware Google_Celes.7287.92.74

Just to be clear, in regards to comment 46:

Do we indeed need to create separate issue reports for every device model that experiences this issue?

Is the issue currently only being investigated and worked on in regards to the model in the original post ("Acer chromebook 14")?

It would be a shame if the issue somehow only gets solved for a specific device model while it appears many different brands and models are experiencing this issue.

marc, freerkm,
If you are saying to press: Alt Shift I
to report a problem, I have done that for my Lenovo N22 Touch.

If this is what you mean, are we supposed to hear back or anything?

If we are supposed to report this issue a different way, please elucidate.  :)

@53: No, what I'm referring to is this current issue thread (#677332).

The original poster of this issue stated that he was using a Acer Chromebook 14. In the meantime people with other brands and models have chimed in reporting the same issue, but comment #46 made me think that there is a chance there will only be a fix for the Acer Chromebook 14 unless we make a separate issue page with a new issue number for each device brand and model that is experiencing this issue.

To be clear, I don't know if we need to do this, I'm asking to see if somebody can confirm either way.

@56: gotcha.

@46 I have an Acer Chromebook 14 and my issue has not been fixed. I have sent reports through alt-shift-i daily; every time my external monitor goes blank in docked mode. Today it went blank while in mirror mode with the lid up so I sent another report.

Same issue on a Acer Chromebook 14 with ChromeOS 56.0.2924.110 (64-bit). Random black outs in docked mode.

Our GSuite for education domain is experiencing this issue with multiple devices including Chromebits. Its just happened to me:

Version 56.0.2924.110
Platform 9000.91.0 (Official Build) stable-channel veyron_minnie
ARC Version 3756504
Firmware Google_Veyron_Minnie.6588.237.0

We have the same issue with 7 ASUS CHROMEBOX-M004U (CN60) 4 GB RAM with 16 GB storage connected with duel monitors. The Chromebox has an HDMI port and Display port. Each workstation has matching monitors by brand, model, and screen size.  But the cable configuration may vary between each workstation.  HDMI to HDMI (default), but the Display Port will use an adapter to convert to HDMI, DVI or VGA depending on monitor model architecture.

The Chromebox will work fine with dual screens. Then all of a sudden, the second monitor connected to HDMI port will go blank. Or both Chrome browsers, opened on each screen, will black out. Attempts to use the ALT+Shift+I do not wake up the second monitor. I have swapped out Chromeboxes (same model but brand new), monitors, and cables for 2 different end-users, but the same result.  I have increased the RAM to 16 GB, but same result.

Version 56.0.2924.110
Platform 9000.91.0 (Official Build) stable-channel daisy
Firmware Google_Snow.2695.117.0

https://crbug.com/694034 has been merged into this issue.

Hi,

Can we have an update on this investigation?

Thanks!

Yes, update please. My Lenovo N22 is on a KVM with a Win 10 PC and I no longer switch to the N22 because of the frustration of only getting 5 - 20 minutes use out of it.

I Have an Acer r11 and have the same problem as most people. I have tried to use Keep Awake and dim the laptop screen, however that just gives me the same issue i.e. when I dim all the way down, the machine goes into automotive docking mode and the external monitor randomly goes blank. THe only way to keep it up is to use keep awake and leave both monitors one, even if you are not using the one on the chromebook. I did not have these issues with my Toshiba Chromebook 2.

Thank you

Been working with Acer support and they have finally acknowledge the problem and I was told that Intel will be making new drivers asap.

@65. Thank you very much

@65 Is there an acer Tracking number please or a way to track the progress? Thank you

@63 comment... I should clarify that the monitor does not go through the KVM switch, it has cables to both my desktop and Chromebook because the desktop does not have HDMI. So when I 'hit the switch' on the KVM, I also have to 'hit the switch' on the monitor to switch its input between VGA and HDMI.

I am now on Version 57.0.2987.137 (64-bit), Platform 9202.60.0 Official Stable channel and I just got in my @ 20 minutes of use with my Chromebook docked before the external monitor turned a nice shade of pale blue.
So, I'm back on my desktop. Again.  :(

My Samsung model xe500c13-k02us blacks out in extended screen mode non stop and mirroring has stopped working completely. It is not an option for this chromebook to use an external monitor or TV with HDMI. My chromecast works for now with it but I bought this for the HDMI feature since my SG6 did not have MHL. I am about t take both to the campfire if I can figure this out.

I was having this issue quite frequently on my Acer 14 inch aluminum with ChromeOS 57.  However, I think I may have found a work around and possibly a clue to the developers for solving this bug.

The external monitor was glitching quite frequently, and I eventually noticed that this was happening at times when the mouse cursor was being switched. Whenever the cursor changed between arrow, finger, I-beam and so on, or when it disappeared and reappeared for typing and mouse movements, respectively, there was a good chance the display would glitch. To me, the glitches appear to be caused by memory pointers being disturbed, since I see chunks of windows being displaced and parts of the wallpaper appearing.

I believe this glitches are connected to the blank display issue--possibly when certain pointers for functions dealing with the HDMI output get written to bogus values. The work around that I've found is to go into the Accessibility settings and turn on the large mouse cursors. By doing this, the glitches and blank screens appear to be eliminated and the external display is working just as solidly as the built-in. Before finding this, I was very easily able to get the external display to glitch and go blank using the "random click and press ESC" technique. A few clicks and presses and the display would be gone. With the large mouse cursor active, I cannot get the display to glitch with any number of clicks and presses.

Hopefully this might help a few people!

@70: I switched the mouse to the Large cursors as you suggested and have been running over two (2) hours now with only one 'hiccup' on the external display in docked Mode. Interesting fix....

I had noticed the external display behaving better & for longer periods of time on Stable Channel 57 (3-4 hours, even). I am also in Dev Mode so as to access the Play Store (using crosh commands).
 - NOTE: One way I could easily make the docked display blank was to run the 'Outlook for Android' email app. With the Large mouse, I have had Outlook open this entire session without the screen tearing (except once), let alone blanking.

You may be onto something--Thanks!

I have received the following from Acer Support regarding my R11.
"We just got an update that there is a known issue with display driver which is causing the external display device blacking out intermittently. Google will be releasing an update soon to fix this issue."

We appreciate your post, Mr. about@gmail.com -- but do you REALLY believe them when they tell you that they're going to fix this bug someday? In my humble opinion, if they were serious about fixing this problem, they would have it fixed by now. Haven't they known about this bug for nearly a year? Look how hold this discussion thread is. And it's the same discussion thread as this one which began in June 2016: https://productforums.google.com/forum/?utm_medium=email&utm_source=footer#!msg/chromebook-central/WGW6CJFSFzY/QhP1LSXkEwAJ 

I am also having same problem in Lenovo N22 chromebook extending monitor to Dell via HDMI. I closed lid of laptop to use only second screen and a separate keyboard and mouse connected to monitor via usb with one usb cable connected from monitor to laptop.

how can i create log or report issue from my laptop?

Anyone here had this issue solved yet?

@74, bug reporting can be done by pressing: Alt Shift i
This will bring up the window to enter your issue.
You can reference this bug report where you left your comment, 677332.

Have an ASUS CS202SA driving a 24" HP Monitor via the HDMI port:  don't think that the computer can handle the 1920 x 1080 resolution - as the monitor goes blank every 10 minutes, and the computer display coordination gets totally out of sync.  It's a pain turning of the monitor, pulling the HDMI plug, and opening and closing the laptop screen.  Don't know the right sequence, but eventually the screen comes alive.  Pressing ctrl-F4 through a sequence finds 1366 x 768 (best), so we'll see if the external monitor won't go blank, now.  My guess is that there is a combination of hardware and operating software deficiencies.

Well, version 58 Stable channel has not fixed this issue on my Lenovo N22-20. It did take about 3 hours before the screen blanked after I ran the Crosh commands to install the Play Store.

I was using the Large mouse cursor so I went back and unchecked that option from Accessibility to test this issue with this new build.

But even before running the Crosh commands, and afterwards, the screen would tear for an instant every now and then. I know from experience that my time is limited.

A Note to those using Crosh to enable the Play Store:
The last line used to be: echo "--enable-arc " >> /etc/chrome_dev.conf
but "--enable arc " has been 'depreciated'. The new line is:
echo "--arc-availability=officially-supported " >> /etc/chrome_dev.conf

I am having same problem using the Acer Chromebook 14 Gold Aluminium connected to external LCD via HDMI. I running on version 59.0.3071.47 (Beta channel).  

There is no progress since version 57 where I captured this problem for first time.

Acer Chromebook14 CB3-431 brand new out of the box, after owning an original Samsung Chromebook for 4 years and no issues, I sold it to my friend and "upgraded" to this thinking better processor, more RAM, and a bigger display with 32GB strorage would be great!....NOT.. nothing but issues.. very disappointed.. may go back to Windows PC or laptop at this point.

This screen blackout issue really makes me wonder if Google and Chromebooks ever will be as good as owning a "real" computer.

With latest Chrome OS upgrade I can close the lid and keep working in my
monitor. Give it a shot.

Version 60.0.3107.0 dev (64-bit)
Platform 9582.0.0 (Official Build) dev-channel terra
ARC Version 4034623
Firmware Google_Terra.7287.154.80

@82, thanks for the heads-up. I'm at the same version, platform, ARC.

I've had my Lenovo N22-20 up and docked to my 23" HDMI monitor for over 6 hours now with no screen jitters or blanking screen. I used it @ 2.5 hours, then walked away for a couple of hours, then just hit the keyboard space bar to bring it back. I have been back on for about 3 more hours with a clean crisp display.

I did my Outlook for Android app that always seemed to cause the issue while playing some tunes while doing the usual email, surfing & opening a dozen tabs, etc.

Hopefully the fix is now in Dev and maybe it can make it into Stable 59? Please check it out and report back so 'the crew' can know if it is fixed for you.

I have an ASUS ChromeBox with two monitors. The primary monitor is a highend DELL and from time to time, when I wake from sleep, the primary remains black and the secondary wakes normally. The keyboard and mouse thinks the screen is visible.

Also reporting an issue with Acer Chromebook R11.

It's been months now, has there been any progress?

Also running an Acer R11 and experiencing the exact behavior described here. Is there any data I can provide to help move this along?

Yesterday was bad 6-21-17. The screen on my monitor would go black about every 10 minutes.
Today I have been on the HP chrome book for about 3 hours with no concerns. The screen did shift 2 time and the screen blanked for approx 2 seconds. I checked and am at current OS. Maybe is fixed as this is the longest that the monitor has been stable since Christmas. Was so sick of this crap ordered a new laptop should arrive next week. Just my luck  Cheers

Not sure if this is related, unrelated, or perhaps a side effect of the fix. After an update to version 59.0.3071.91 on an Acer Chromebook 14 CB3-431 the HDMI video output goes to a single RGB color after a variable period of time. Audio continues. The color displayed on the remote screen will be one of the colors seen on the screen at the time the video is lost. This occurs both in mirrored and extended screen modes. The single color fills the screen. Note that this change to a single color occurs only after a variable amount of time, ten to twenty minutes. This behavior did not occur prior to 59. If this seems to be unrelated, then perhaps I should file a bug report as I cannot find anything similar to this behavior in the list of known issues.

@88, seeing your comment, I decided to try connecting my HDMI monitor to my Lenovo N22 again and closing the lid to be in docked mode. At first, it seemed to be work and I went about 30 minutes seeing it tear a couple of times, but then I had to go do something. I left it with the external monitor still operating properly.
I came back to it about an hour later to a blank screen, clicked the mouse button and it came alive--Nice!
I ran it for another hour or so and saw the screen tear a few more times, but it held sync. Until it didn't.
So, on Stable channel, it is still 'broken'. This sure is taking a l-o-n-g time to get fixed. Maybe non-Intel chips/CBs is the solution?

i'm having similar issue with asus chromebook, lg monitor, logitech keyboard and mouse.  repeatedly pressing the escape key with chromebook in docked mode caused white blank screen in my case.  temporary work around is to not to use dock mode leaving the laptop in almost covered mode.  no issue so far even with repeated escape key presses.

i switched to beta channel and it worked for me.  docked mode with repeated escape key presses did not crash my chromebook.  maybe you should give it a try too if you have similar issue.

Acer R11, symptoms very much the same

Any fixes on this issue? I have had this problem for months now on my Samsung Chromebook and LG Ultrawide Monitor.

I tried a variety of things, including a chrome extension that should leave
it on always, nothing worked.  Then I saw a suggestion from a user that
he/she went to settings/accesibility, and changed the mouse cursor to
"Large".  It worked!  Don't ask me why, but I haven't had a problem (other
than a huge cursor) since.  As a final test, I wnt back to the normal
cursor and the problem reappeared.  Switched back to the large mouse cursor
and everything worked.  Please let me know if this works for you.

As a side note, my "research"/Google searches indicated the following
commonalities and differences:

1.  All problems I saw were on chromebooks with touchscreens.
2.  It is not manufacturer specific.
3.  It is not screen size specific.
4.  Several suggestions in various fourms suggested updating to the latest
Chrome OS and included a minimum version number.  My version was already
newer (and the latest)
5. Some suggested adding the Chrome extension "Keep Awake".  It didn't help
(on my Acer R11).

I can't believe it's been almost 2 years and this bug is still common place. I literally bought this device with it's sole purpose to stream HDMI video to my TV, and for the first 30 days it worked fine. It wasn't until after my return period ended did the problem arise! Now I am stuck with this garbage computer that will periodically stop displaying video and the only way to fix it is to restart the entire machine, log back in, go back to find whatever I was watching, and then find the spot where I left off... Absurd!

I am not even going to elaborate on the specifics of the problem since it's been detailed to death as described in this and many other threads. Just know that I have the problem and it NEEDS TO BE FIXED!

I agree it's past time for this to be fixed.  Meanwhile, Try changing to a
large mouse pointer in your accessibility settings as a work around.
That's worked for me and several others on this forum and hopefully points
the developers in the right direction.

I'm having the same issue with the new Acer R11 with the N3160 processor. Should I leave this here or create a new issue due to the hardware difference.

Version: 59.0.3071.91  
Channel: Stable
Firmware: Google_Cyan.7287.57.100

Tried the cursor workaround - Did not work

I would like to report that my Acer R11 is having the same issue with an LG 24M45 monitor.

Version 58.0.3029.140 (64-bit)
Platform 9334.72.0 (Official Build) stable-channel cyan
ARC Version 4015103
Firmware Google_Cyan.7287.57.100

I would like to report I am having the same issue with my Chromebook 11 connecting to my LF monitor via a HDMI port.

The monitor works as expected until I switch my Chromebook into dockmode and shortly (20 seconds - 2 minutes) the monitor goes blank but is not in sleep mode as has been described in the previous comments.

OS version: Version 59.0.3071.134 (Official Build) (64-bit

I just bought an ASUS Chromebox. I am using an HP W2082a monitor. The monitor works fine. But, when I sign into my google account, the screen goes black, then the account resets. This happens 3 times. Then, on the fourth reset, the Chromebox restarts with my account signed out. Then, everything is stable until I try to sign in again.

Hello!

All of a sudden, neoter of my chromebooks will extend to two external monitors I have. The specs on the chromebook I am currently using are listed below (the other is an ASUS C100 Flipbook with 32bit and new version of the os).

The first monitor was a Samsung Syncmaster SA350. Worked fine for several months (even though it said it was 'not playing nicely' - but it did) then, all of a sudden, no extension.  I thought maybe the monitor was tool old. Yesterday, I bought a Samsung C32F391FWN (32" curved) and am using the HDMI cable supplied with the monitor (the flip has mini hdmi to hdmi which is why i am using this older Samsung Chromebook).

Extension will work properly sometimes. On every occasion, when I plug the cable into the chromebook, the notification pops up in the bottom right acknowledging the monitor model number. The variation is at this point:

(1) sometimes it will then display the extension and i can close the lid on my chromebook and use my ext keyboard and mouse for a while, until the external monitor will go all blue or gray and will not go back until I unplug the HDMI from the chromebook

OR

(2) the monitor will remain black except the monitor info pop up of 'HDMI' and menu for a brief moment. The mouse clear goes into a dark abyss from the chromebook screen. so there is 'space' , but no picture.

And on the  asus c100p flip. when i plug in the micro hdmi to hdmi, the computer recognizes the monitor, and there is an extension, as the windows disappear from the chromebook monitor, and the mouse goes into the same abyss, but the screen is not only blank, the power indicator light starts to blink as if nothing is plugged in.

The same problem happens if the chromebook connected to an external display goes into idle mode when in docked mode. When trying to wake up again by using keyobard og mouse nothing happens. You have to start the chromebook all over again to get picture on the external screen.

Reporting the same problem on an Acer Chromebook 14. This issue is unbelievably frustrating, and solidified my decision this is the first and last Chromebook I'll purchase.

No disrespect intended to the fine folks who fix bugs, but it's just a few more weeks until this bug celebrates its one year birthday. It's a year without a fix, and I'm sure the bug fixers are hard at work fixing this, but respectfully, they should consider posting an update on their progress before the one year birthday comes and goes. Otherwise folks might mistakenly believe nobody's working on this bug.

My Acer R11 Chromebook. It seems to work now. I have worked an entire day without an issue. I do not know what to attribute it to however.

Having gone through a flurry of updates recently, I decided to retest the screen blacking out problem.  Previously, I followed advice from another user on this forum and switched to a large louse cursor which seemed to work (for months).  I disabled the large mouse cursor (accessibility functions) and my Acer R11 chromebook now works just fine.

@103, Mike.cha...@live.com: One option would be to buy a non-Intel Chromebook because it appears this is an Intel-related issue. My Samsung Chromebook Plus has no issues when docked.

@106: Thanks for the info. I'll have to connect my Lenovo N22-20 back to my monitor and give it a try. Last time I did, about a month or more ago, it worked solidly for several hours one day, but the next day it started getting that occasional 'jitter' that led to a blank external monitor after a couple of hours.
I've noticed that if I see the screen jitter/jump/break for a split second that it will eventually go dark after this happens a few times. I still believe it is a sync issue.

Well, I've had my Lenovo N22-20 Chromebook docked with the lid closed the last three days and have not had a single blank or even jittery screen. It's been very solid--like it is supposed to be.

I was first on the Beta OS, 61.0.3163.117, but switched to Stable yesterday when I learned it now has Night Light in Flags. Unfortunately, after the Powerwash, it is at 60.0.3112.114 instead of 61.0.3163.113.
On the Plus side, though, it is rock steady on the latest v60 version of the OS.

Brand new Acer Chromebook 14 with same problem. Please fix.

Ditto!

Platform
10032.86.0 (Official Build) stable-channel edgar
Firmware
Google_Edgar.7287.167.71
Channel
Currently on stable
CHANGE CHANNEL
ARC Version
4524559
Blink
537.36 (@)
V8
6.3.292.49
User Agent
Mozilla/5.0 (X11; CrOS x86_64 10032.86.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.140 Safari/537.36
Command Line
/opt/google/chrome/chrome --ppapi-flash-path=/opt/google/chrome/pepper/libpepflashplayer.so --ppapi-flash-version=28.0.0.137 --ui-prioritize-in-gpu-process --use-gl=egl --enable-native-gpu-memory-buffers --gpu-sandbox-failures-fatal=yes --enable-logging --log-level=1 --use-cras --enable-wayland-server --user-data-dir=/home/chronos --max-unused-resource-memory-usage-percentage=5 --disable-lock-screen-apps --login-profile=user --has-chromeos-keyboard --default-wallpaper-large=/usr/share/chromeos-assets/wallpaper/oem_large.jpg --default-wallpaper-small=/usr/share/chromeos-assets/wallpaper/oem_small.jpg --default-wallpaper-is-oem --guest-wallpaper-large=/usr/share/chromeos-assets/wallpaper/guest_large.jpg --guest-wallpaper-small=/usr/share/chromeos-assets/wallpaper/guest_small.jpg --enable-consumer-kiosk --arc-availability=officially-supported --enterprise-enrollment-initial-modulus=15 --enterprise-enrollment-modulus-limit=19 --login-manager --policy-switches-begin --enable-features=MaterialDesignExtensions --policy-switches-end --first-exec-after-boot --vmodule=*arc/*=1,tablet_power_button_controller=1,*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,*night_light*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2 --enable-features=MaterialDesignExtensions
Build Date
Tuesday, January 9, 2018

Seems related to YouTube?!...

p.s., If this isn't fixed within the next month, I'll be forced to return my new Chromebook to Amazon, and go back to shitty Microsoft Windows...your ball!

After you reproduce it, please file feedback through Shift+Alt+i and mention crbug.com/677332#c110 in the comment section.

Happy birthday, Bug! This bug is a year old now. Check post number one above — it’s dated January 2017. Google should just admit they’re not going to fix this bug. Making all these people report the same bug again and again for a year is just so unfair to people in my humble opinion.

@patr,  Actually, It's even older: https://productforums.google.com/forum/#!topic/chromebook-central/WGW6CJFSFzY was posted June 3rd, 2016.

I have an Acer "Chromebook 14 for work CPS-471" that is also creates loss of signal incidents to a 46 inch 1080P Westinghouse LD-4268 monitor via HDMI.  The loss of signal can be either temporary for 5-10 seconds or permanent requiring a disconnect/connect cycle of the HDMI cable to restore signal.  The Chromebook settings show the connected external monitor for short duration loss incidents and show no external monitor at all for permanent incidents. A feedback using shift+ALT+i will be sent. at the next incident and a few after that.

Still doing it...

hi google,
SHIT did hit fan again -;)
ver64/167

SCR disconnected [ 19th time ] again while play youtobe videos [ mostly short music of ~4 min long ], after about 7 min of play & about 2 min of last mouse activity,

no fix, no reply from you !!!
SCR went off again while youtube play videos, this chromebook BUG is persistent day after day, it SHALL & MUST be fixed ASAP !!!
I do not observe that behaviour when play NON-YOUTUBE content !!!

set-up to reproduce
--------------------
-chromebook & hdmi TV set to mirror,
-reduce brightnes on chromebook to 0,
-chromeOS quit mirror set,
-hdmi TV is prime SCR & display pic,
-play youtube vid at 1080p [ after sign in to youtube as chromebook member ],
-I did do hose-keep of LIKE VIDEOS list - continued keybord & mouse use !!!
-after ramdom time - here about 3 hrs of play - TV is not displaying video,
-chromebook continue to play vid [ sound & picture ],
-increase chromebook brigthes to max, chromebook is OK [ sound & pic ], TV in on but no REAL video MIRROR pic,
-I see that TV is connected to chromebook & is receiving signal, but signal is not REAL VIDEO which is played on chromebook,
-TV will show NO SIGNAL msg on scr when TV is mot receiving signal on HDMI cable, here TV is receiving signal on hdmi cable, but signal is wrong,

thanks, fresh clean
=====================

Similar issue here. Have dual monitors connected to Lenovo USB-C dock via my Thinkpad 13 Chromebook. Monitors continually flicker from Displayport to seaching/black screen and then come back on. I have another non-chrome OS laptop that I have connected to the same exact setup (usb-c dock/monitors) and there are no issues whatsoever.

Platform
10176.72.0 (Official Build) stable-channel sentry
Firmware
Google_Sentry.7820.314.0
Channel
Currently on stable
ARC Version
4600522
Blink
537.36 (@)
V8
6.4.388.45
User Agent
Mozilla/5.0 (X11; CrOS x86_64 10176.72.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36
Command Line
/opt/google/chrome/chrome --ppapi-flash-path=/opt/google/chrome/pepper/libpepflashplayer.so --ppapi-flash-version=28.0.0.161 --ui-prioritize-in-gpu-process --use-gl=egl --enable-native-gpu-memory-buffers --gpu-sandbox-failures-fatal=yes --enable-logging --log-level=1 --use-cras --enable-wayland-server --user-data-dir=/home/chronos --max-unused-resource-memory-usage-percentage=5 --login-profile=user --has-chromeos-keyboard --default-wallpaper-large=/usr/share/chromeos-assets/wallpaper/default_large.jpg --default-wallpaper-small=/usr/share/chromeos-assets/wallpaper/default_small.jpg --child-wallpaper-large=/usr/share/chromeos-assets/wallpaper/child_large.jpg --child-wallpaper-small=/usr/share/chromeos-assets/wallpaper/child_small.jpg --guest-wallpaper-large=/usr/share/chromeos-assets/wallpaper/guest_large.jpg --guest-wallpaper-small=/usr/share/chromeos-assets/wallpaper/guest_small.jpg --enable-consumer-kiosk --arc-availability=officially-supported --enterprise-enrollment-initial-modulus=15 --enterprise-enrollment-modulus-limit=19 --login-manager --first-exec-after-boot --vmodule=*arc/*=1,tablet_power_button_controller=1,*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,*night_light*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
Build Date
Tuesday, February 13, 2018

64.0.3282.167 still broken, AND...Remote Desktop stopped working TOO!  Congratulations Chrome OS Dev on not testing your release, before releasing it!

https://www.calculatorsoup.com/calculators/time/age-calculator.php

It's zero-blank-twenty-five, and Maya is reminding you still haven't caught External Be-lank-screen.:

Exact Age of bug: 677332
= 1 years 9 months 3 days
= 21 months 3 days
= 641 days

https://productforums.google.com/forum/#!topic/chromebook-central/WGW6CJFSFzY

WTF are these 2 comments about & mean to address ?
comment #124 & #125 by marc...

it is how youtube & google fixing SERIOUS issues ?
almost 2 years old [ RANDOMLY occurring ] problem / bug & no fix or attendance to problem, why not ?

I reported ISSUE / PROBLEM / BUG on several accessions by official CHROME OS ISSUE reporting facility, nobody contacted me back !!!

theoretically [ let assume that 100 % ] RANDOM problems do not occur [ surface ] because of mistake in programming,

when programming mistake is made, problem will be reproduceable ALL TIME EVERY TIME when leading sequence will occur, here PROBLEM occur or not occur [ at random ] therefore problem is not result of programming mistake but DELIBERATE youtube / google intention to make problem RANDOMLY be visible - such RANDOM PROBLEM generator [ based on some specific LOGIC ] is very simple to make !!!

when such RANDOM PROBLEM GENERATOR is activated, RANDOM PROBLEMS start to occur,

how frequently ?
it is up to PROBLEM GENERATOR logic - every day, every hour, every week or so to say !!!
to whom ?
again, it is up to PROBLEM GENERATOR logic too !!!

because this problem was not practically attended for almost 2 years, it seems that youtube / google has INTEREST that PROBLEM GENERATOR is not removed,

I would like that youtube / google people comment on above made ASSUMPTION -;)
=====================
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Weidongg@ to triage the issue in bug description: external monitor blacking out in docked mode.

Re other issues, including docking stations - please report them in separate bugs.

in relation to comment #127 content,
=====================================

1- BUG has RANDOM occurrence, therefore it is not programming mistake,

2- BUG is not BLANKING external TV but is stopping to display what TV was displaying, PC continue to display [ when brightness is increased to any value except ZERO ] & sound content,

3- when TV is stopping to display what TV was displaying, TV scr colour is set RANDOMLY to any colour [ including BLACK ], but TV is reporting to receive signal from PC,

4- TV continue to be connected to PC & TV is receiving signal from PC [ when TV has no signal on/from HDMI, TV would report on scr; NO SIGNAL ],

5- BUG has occurrence on TV connected by HDMI to PC, as TV is not MONITOR,

I hope that my above comments shall clarify mis-understanding of this RANDOM BUG -;)
=======================
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It ONLY happens watching 1 hour our less of Youtube video.  It NEVER happens on Hulu, Netflix, VLC, etc...!  So NO!  IT IS NOT RANDOM AT ALL!

             F....I....X     I....T    !

more testing to recreate BUG,

hardware set-up to reproduce problem
======================================
TV is 50in 1080p panasonic,
PC is ACER Chromebook 14 (CB3-431) with 1080p scr,
mirror PC & TV by HDMI cable [ when boot-up TV say; mirror to TV 1080p/60 Hz ],
login to PC [ chromebook ] by OWNER account,

in PC SET-UP page for DISPLAY [ my preference -;) ]
====================================================
say; mirror internal display, internal display resolution 1080p [ best ],

in PC SET-UP page for POWER [ my preference -;) ]
==================================================
When idle; keep display ON,
Sleep when lid is closed; DISABLED,

PC set-up for accessibility [ my preference -;) ]
==================================================
large mouse cursor; ON,
highlight mouse cursor; ON,

USING extension [ always is ON ]
=================================
uBlock Origin 1.15.2

PC chrome OS
=============
Version 64.0.3282.190 (Official Build) (64-bit)
Platform; 10176.76.0 (Official Build) stable-channel edgar
Firmware; Google_Edgar.7287.167.96
Build Date; Sunday, 25 February 2018

START to use PC & recreate PROBLEMS ]
=====================================
- check google account email [ no log-in required ],
- log-out from google account & all sessions [ if any ],
- open youtube tab in chrome browser as VISITOR [ without sign-in to google account ],
- select video to play in full SCR

for all test runs
==================
- no user interaction with PC [ no mouse or/and keyboard use - just watch video on both screens; PC & TV ]

VPN Technology Course Day 1
https://www.youtube.com/watch?v=KY0mGpVo9Ak
[ video is 1h49m duration & has max 720p resolution ],
1st run
after 5m53s TV stopped to display VIDEO but continue to play video SOUND & video played on PC,
TV went in to RANDOM colour, PC continue to play VIDEO [ sound & picture ], TV continue to receive signal from PC over HDMI cable,
2nd run
did not get problem on same video in 54m48s, problem did not occur !!!

Psychedelic Trip Music And Visuals 2018 (HD) PART 4
https://www.youtube.com/watch?v=ccNd34WfMkI
[ video is 28m duration & has max 1080p resolution ],
after 1m28s TV stopped to display VIDEO, TV sound played as normal !!!
TV went in to RANDOM colour, PC continue to play VIDEO [ sound & picture ], TV contione to receive signal from PC over HDMI cable,

What DMT is like - DMT Trip Simulation (1080p)
https://www.youtube.com/watch?v=9UcKhas3HCk
[ video is 2h03m duration & has max 1080p resolution ],
after m26s TV stopped to display VIDEO, TV sound played as normal !!!
TV went in to RANDOM colour, PC continue to play VIDEO [ sound & picture ], TV continue to receive signal from PC over HDMI cable,

Paul Kalkbrenner - Sonar Festival Set 2013 [LIVE-SET] + Visual effects in HD - FREE DOWNLOAD
https://www.youtube.com/watch?v=-N0NEGGigd8
[ video is 1h29m duration & has max 1080p resolution ],

special config for this video - different test;
I disabled youtube sound & stream [ play ] music from spotify in 2nd TAB,
after 5m20s TV stopped to display VIDEO, streamed sound from spotify played as normal !!!
TV went in to RANDOM colour, PC continue to play VIDEO [ sound & picture ], TV continue to receive signal from PC over HDMI cable,
=======================
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in relation to Comment 129 statement,
=====================================

I shall say before more clearly, I'm sorry, my fault -;)

RANDOM OCCURRENCE when STREAM youtube video, as I did not find that BUG when PLAY MY VIDEO [ from USB ] or when STREAM video from other source [ let say PORNO site provider -;) ],

to put MY RANDOM statement to rest
====================================

RANDOM when STREAM / PLAY YOUTUBE [ google own company ] VIDEO !!!
=======================
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additional info that shall help youtube / google people to fix problem
=========================================================================

I would like to mention that NOW [ v64/140 & 190 ] chromeOS is NOT DISPLAYING notification telling user that PC is in DOCKED MODE & user can continue to use PC even when LID is CLOSED,

see this video Published on Jan 19, 2017 [ at about 0m40s MSG is on scr telling that notification - old ver of chromeOS ]
https://www.youtube.com/watch?v=W9ndcruTs34
How to setup docked mode (Chromebook)

google did change chromeOS & removed DOCKED MODE [ & notification ] long time ago,
=======================
thanks, fresh clean

another different take on this problem [ GOOGLE SHIT ],
=======================================================

installed APP [ NOT EXTENSION !!! ] on chromebook to play youtube videos OUTSIDE chrome web browser, I selected;

iPrevYou - YouTube™ Player - Chrome Web Store.mhtml
https://chrome.google.com/webstore/detail/iprevyou-youtube-player/blijlgfnjhnhmnaldaiienmjggbjhbaa

which is equivalent to apple safari picture-in-picture player to play youtube videos outside web browser - it is APP & not browser extension,

started to play music videos & after several min [ about 20 min ] BUG [ 677332 ] did surface again,

except installation of that APP, all set-up on my chromebook did remain same, therefore, I'm reaching [ it is my assumption -;) ] conclusion that it is YOUTUBE [ google own company ] VIDEOS future implemented by GOOGLE to annoy VIP google supporters - CHROMEBOOK VIP USERS !!!

obviously, I may be wrong with my assumption [ conclusion ] & I will apologise for my assumption, unless google can prove OTHERWISE -;)
=======================
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Since my initial submittal - Comment 117 by scotth1894@gmail.com, Feb 16 - I have sent numerous "Shift-Alt-i" reports.  Are these helpful?  

BTW a co-worker using a Chromebook 14 has the same issue occurring using the HDMI port.  He is using multiple vendors of monitors all of which newer models than what I show - both larger and smaller size. So the issue seems to be video support.

additional info that shall help youtube / google people to fix problem
=========================================================================

I did play youtube music videos in;

- normal TAB &
- incognito TAB

same problem existed in both, after random time elapsed since starting to play my test playlist, BUG [ 677332 ] did surface again, that test was done after LOGIN to account, and than I selected to play offered music videos without login to my account, again same problem did occur irrespective of login or without,

I did another test to play - almost same / identical music videos but this time from;

- chromebook internal storage, and
- external USB disk,

after more than 60 min of play of each selection, BUG [ 677332 ] did not BLANK / did not stop to display video, on my external TV !!!

BUG [ 677332 ] is stopping to display video on external TV connected by HDMI cable only when play videos from youtube, and stopping to display videos is occurring after RANDOM time elapse from starting to do it !!!
=======================
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additional STEPS I did make to eliminate / fix youtube / google BUG [ 677332 ]
================================================================================

1st I did
==========

Reset your Chromebook to factory settings
https://support.google.com/chromebook/answer/183084

RESET did not fix problem; to stop to display YOUTUBE [ music ] videos, on my external TV, RANDOMLY occurring stop to display YOUTUBE [ music ] videos resurfaced again in same / identical fashion !!!

2nd I did
==========

Recover your Chromebook
https://support.google.com/chromebook/answer/1080595

RECOVERY did move me back to older ver, than I UPDATED MANUALLY chromeOS to current v64/190,

RESET did not fix problem; to stop to display YOUTUBE [ music ] videos, on my external TV, RANDOMLY occurring stop to display YOUTUBE [ music ] videos resurfaced again in same / identical fashion as before RECOVERY !!!

CONCLUSION
============

BUG [ 677332 ] is stopping to display video on external TV connected by HDMI cable only when play videos from youtube, and stopping to display videos is occurring after RANDOM time elapse from starting to do it [ play ], BUG [ 677332 ] is present even when DRASTIC STEPS I made to FIX it [ GOOGLE SHIT ] such as;

- resetting of my chromebook to factory settings, and
- recovery of my chromebook from fresh downloaded chromeOS to USB disk,
=======================
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additional tests
=================
all my tests are confirming RANDOMNESS fact of occurring of that BAG [ 677332 ] - random time interval [ from start of play youtube videos ] to external TV connected by HDMI cable, to moment when TV is losing VIDEO signal but play video sound well on TV,

test #1
========
I did play about 12 music videos [ from PLAYLIST ] for about 2 hrs & 30 min, TV did not lose VIDEO signal for 2 hrs & 30 min, I did not encounter ISSUE !!!

test #2
========
I did play different 13 music videos & TV did lose VIDEO signal after
about 1 hr & 5 min,

test #3
========
I did play 37 different music videos for about 3 hrs & 20 min, and TV did not lose VIDEO signal

conclusions
============
these 3 tests of play youtube music videos are confirming that bug is occurring after RANDOM interval of time from start of play, all 3 tests did RUN from PLAYLIST of about 270 music videos,
=======================
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AUTO updated chromeOS to ver 65/184 [ stable ] on my ACER platform,
and guess what ?

GOOGLE SHIT [ BUG 677332 ] did hit fan again yesterday !!!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

test #4
========
did play youtube [ 1080p ] music videos from playlist, and at 9th music video HDMI connected TV stopped to display video & SCR went green, BUG did occur about 45 min from start of play my extensive playlist [ I started play from #71 ],

as you all may see from my last 4 tests [ 4th test in just released stable ver 65/184 couple of days ago ], GOOGLE SHIT [ BUG 677332 ] is surfacing after RANDOM interval time from start of play !!!

and no GOOGLE fix or even attempt to fix it since ver 55/103 [ current ver is 65/184 ] - almost 2 years ago !!!
=======================
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Still a problem!: 66.0.3359.79

+yihsin@, is this WAI on youtube side for comment #136 ?

Interestingly enough, i don't experience this on my acer 14 chromebook, but i do experience the issue on an chromium installation on my old samsung series 5 ultra laptop:

Here are their configurations:
https://gist.github.com/coderofsalvation/0399ba9ed05f7c08550d6e6d4c6d0582

additional tests
=================
I did play YT music videos from my long playlist of 282 songs, I did start from #70 & I did stop manually [ my req to stop play ] at #155 - 85 music videos nonstop play for about 5hrs & 50min - GOOGLE SHIT [ YOUTUBE service BUG 677332 ] DID NOT hit fan again, all went smoothly to end -;)

therefore, all my tests are confirming RANDOMNESS fact of occurring of that BAG [ 677332 ] - random time interval [ from start of play YT ] to external TV connected by HDMI cable, to moment when TV is losing VIDEO signal but play video sound well on TV,

therefore, all my tests are confirming that it is NOT SOFTWARE BAG in chromeOS or/and in youtobe service, but INTENTIONALLY introduced youtube service future to channel FREE customers into PAID service !!!

prove that I'm wrong & I will APOLOGISE PUBLICLY for made by me assumptions / allegations !!!
=======================
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additional tests
=================

test #6 [ 3 short tests one after another ]
============================================

I did play YT music videos from 3 different & short playlists, when uninterrupted play from playlist ended, I used keyboard/mouse to interact with chromebook, therefore I may see this test as 3 independent & shorter YT not-interrupted play tests,

for this test I did use my old previous chromebook I ditched years ago - lenovo 11in, before YT play test I updated chromeOS to current ver [ Version 65.0.3325.209 (Official Build) (64-bit) ], for this test I did use same;

- panasonic 50in FHD TV, and
- HDMI TV cable,
- mouse & keyboard too,

I'm normally using LARGE CURSOR with highlight mouse cursor set to ON,

additionally I'm MIRROR PC SCR to TV, then I'm setting PC SCR brightness to ZERO,

under chromeOS set-up for POWER, I'm using;

- when idle I'm using KEEP DISPLAY ON, and
- sleep when lid is closed I'm using it [ is set ] to OFF,

when using chromebook [ including this test & all my previous tests ], I'm always using it with LID CLOSED, I did play music videos from my 3 lists;

1st- 15 non-stop movies, about 60 min not interrupted play
2nd-  9 non stop movies, about 30 min not interrupted play
3rd- 17 non stop movies, about 70 min not interrupted play

GOOGLE SHIT [ YOUTUBE service BUG 677332 ] DID NOT hit fan again, all went smoothly to end - total play time; about 2 hrs and 10 min -;)
=======================
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additional test
================

test #7
========

I did play YT music videos from playlist that has 18 music videos on my main chromebook [ acer 14in ], no keyboard/mouse was used to interact with acer chromebook when YT play was on, that chromebook is running latest chromeOS [ v65/209 official 64 bits build ] & test did use same setup as before;

- panasonic 50 in FHD TV, and
- HDMI TV cable, and
- external mouse & keyboard,

I'm normally using LARGE CURSOR with highlight mouse cursor set to ON, additionally I'm MIRROR PC SCR to TV, then I'm setting PC SCR brightness to ZERO, under chromeOS set-up for POWER, I'm using;

- KEEP DISPLAY ON [ when idle ], and
- OFF to [ sleep when lid is closed ],

when using any chromebooks [ including this test & all my previous tests ], I'm always using it with LID CLOSED,

GOOGLE SHIT [ YOUTUBE service BUG 677332 ] DID NOT hit fan again, all went smoothly to end of playlist of 18 videos in non-stop play for about 1 hr & 15 min !!!

WTF is going on now ?
~~~~~~~~~~~~~~~~~~~~~~

no more GOOGLE SHIT [ YOUTUBE service BUG 677332 ] - at least so far for now on my lenovo [ old one ] & acer [ recently new one ] chromebooks -;)

I did notice that 5 [ five !!! ] GOOGLE / YOUTUBE staff are attached to this BAG & nobody is willing to tell [ at least officially ] WTF is going on for past [ almost 2 years ] with this PROBLEM !!!
=======================
thanks, fresh clean

Still a problem: 66.0.3359.102

For now, until this issue is fixed, please have YouTube just switch the default player back to FLASH!  Yes, you want to move away from FLASH, and you can take all the time you need to figure out why HTML5 is heating up the video circuit to external HDMI devices, but for now...please at least end the pain on the customers' side!

additional test
================

test #8
========

did play 17 YT videos [ about 80 min total time ] without any keyboard or/and mouse interruption, I did use for this test 720p YT video resolution to FHD TV [ but TV was set to 1366x768 pix ], additionally I did use VPN openVPN protocol to connect to VPN server then to YT, router was set to limit fibre internet download speed to max 9 Mbps, chromebook used was lenovo 11in one - old but OK for 720p video play, VPN was used [ set-up ] on chromebook by ONC openVPN protocol config imported file, instead as normally I'm using; on very fast router,

rest of my set-ups was as before,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

for about 1 hr & 20 min of non-interrupted YT play, I could not reproduce GOOGLE SHIT [ YOUTUBE service BUG 677332 ], all went smoothly to end of playlist -;)

WTF is going on now ?
~~~~~~~~~~~~~~~~~~~~~~

I see that for past couple [ several ] YT plays - all my tests longer that 1 hr - and conducted on two completely different chromebooks [ old; lenovo & new; acer ]  connected to same 50in TV by HDMI cable, I could not reproduce YOUTUBE service BUG 677332 !!!

in past I could not play [ normally ] for longer than 30 min [ random length of play time from start ] to not reproduce this bag, but not any more -;(

WTF is going on ?
=======================
thanks, fresh clean

Still a problem: 66.0.3359.117

additional 2 tests to play long videos under YOUTUBE service
==============================================================

I did use same set-up as before;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 720p scr & TV & videos played,
- mirror to TV, than scr brightness set to zero,
- chromebook lid closed,
- large cursor,
- HDMI cable to TV,
- external keyboard & mouse,
- play videos while logged in as google user,

test #9
========

I did play YT [ youtube ] music video [ concert 1h46m long - 1 mouse/keyboard interaction in middle of play ], 720p on old lenovo chromebook, I could not reproduce YOUTUBE service BUG 677332 !!!

test #10
==========

I did play YT [ youtube ] music video [ concert 2h16m long - 2 mouse/keyboard interaction in middle of play ], 720p on old lenovo chromebook, I could not reproduce YOUTUBE service BUG 677332 !!!

my conclusions
~~~~~~~~~~~~~~~~

YOUTUBE service BUG 677332 is no longer present !!!
=====================================================

as far as I see, YOUTUBE clandestinely [ surreptitiously at least ] did switch off they future to RANDOMLY stop delivering VIDEO signal to HDMI cable connected TV, therefore outcome is good !!!

no more YOUTUBE shit of intentionally generated to chromebook users [ GOOGLE VIP customers !!! ] anying YOUTUBE video playback problems -;)

[ this BUG 677332 was not & is not present when I did and/or do play any VIDEO from any other source other then YOUTUBE on my two different CHROMEBOOKS [ old; LENOVO & new; ACER ]
=======================
thanks, fresh clean

Still a problem: 66.0.3359.137

How can we contact the YouTube-folk?  If you Chrome-folk can't fix this, how about we go to the source of this problem?  This issue is getting more than a little old, and I'm sure you guys are getting sick and tired of us gnawing on your asses!  Almost as sick as we are of suddenly having to reboot our computers while simply trying to view a few YouTube videos!  How about teaming up to conquer this stupidity?!

I would put it back to triage to be assigned to people with better knowledge.

Acer Chromebook 14 here, same issue.  The large accessibility cursor workaround does NOT work for me.

External monitor flickers randomly, usually after 3-4 hours of use, running extended not docked.

Flickers for up to 20 seconds, each blank taking 0.5 - 3 seconds. Machines recover and are often fine for the rest of the working day.

Three Acer 14" Chromebooks all with latest stable update. Different external monitors and cables, no additional software/plugins/extensions.

Not trying to watch YouTube but may be loaded as part of one or more tabs.

I'm sure this will be fixed soon as Google has a longstanding commitment to quality and support.

(Bulk Edit) Adding the new conops Chrome OS hotlist to all open issues with the "#CBC-RS/TC-watchlist" tag, our former tracking tag.

After lowering Resolution to 768P, this issue had stopped; until 68.0.3440.40 (Official Build) beta (64-bit) caused it to recur on Netflix!  Instead of improving / fixing this bug, it looks like it's somehow been extended to types of streaming outside of YouTube, and even into display settings with lower resource requirements! WTF!

My Pixelbook randomly blacks out and reboots with external monitor docked. There appears to be nothing initiating the blackout and reboot. This is occurring on the Stable channel with version 67.0.3396.99 and the version prior to this.

All I did was reorder a HDMI cable because I needed one
after getting it hooked up like normal and black screen no matter what I do
no mirror option nothing never had a problem ever
Is rebooting really the only way ?
It'snot like I have allot saved but it's still annoying

This is also affecting my Acer CB3-431.

Please developers, fix this issue, this has been going at least 2 years now and nothing has been resolved!?

This only seems to happen with YouTube. Which is a product you own, what the heck!?

hi,
I did post extensively about my experience with that Issue 172207674. My last post indicated to CHROMEBOOK users [ like myself ] that issue in Q is no longer present, therefore I would suggest to any user who experience that issue to FOLLOW my set-up EXACTLY to smallest details.

WHY ?
~~~~~~~

Because I do not have any issues while following myself my SET-UP - including inside latest chromeOS ver of 68.0.3440.87 (Official Build) (64-bit).

Under different set-ups I had plenty of very frequent lost of VIDEO signals to TV, but now under my PUBLISHED set-up I did not encounter not even ONE lost of video signal to TV that would result in POWER-OFF my BOTH chromebooks to temporary fix issue.

IMHO - read my posts carefully, follow my published set-up to smallest details & you to may [ shall ] not encounter any more that issue !!!
=======================
thanks, fresh clean

Regardless of more or setup that I have, this shouldn’t be happening unless there is a power saving mode that I have setup that can be turned off that might help. It is weird because it only happens on YouTube for me. Which would be the last area I would expect it to happen.

My Pixelbook randomly blacks out and reboots with external monitor docked. There appears to be nothing initiating the blackout and reboot. This is occurring on the Stable channel Version 67.0.3396.99 and the previous verson. I have tried 3 different external monitors and about 12 different docks and USB-C to HDMI cables. It happens with ALL of them!

I thought I would chime in here since it is 2018-09-03 and I have now had this issue happen to me.
Acer Chromebook 15 and having identicle black out and crash issue.
Chrome Version 68.0.3440.118 (Official Build) (64-bit)
Doesn't matter the monitor type.
Trying to extend the desktop to the external monitor: invariably at some point in time the extended monitor goes blank.  Sometimes crashing the Acer Chrome 15, sometimes not, but still the chromebook thinks that the monitor is still on as you can roll the mouse off screen and roll it back.  While in the office we tried this with two other non-acer chromebooks.  Easily duplicated the issue on those as well.  Tried with AOC portable USB 3.0 external monitor and an Asus MB169B+ external USB 3.0 monitor.  Exact same issue crept up.  Interestingly enough we often had to reboot the chromebooks for them to even recognize the external USB 3.0 portable monitors.  The middle school has 400 of the smaller version of thee chromebooks so I am going to test it out at the school next week on a few of those devices.

Acer Chromebook 14 CB3-431
Issue is that the secondary, extended display is showing a black screen (still getting signal just no image).
Version 69.0.3497.95 (Official Build) (64-bit)
Monitor is a Samsung S24D300H connected via HDMI to HDMI

Acer Chromebook R11
Version 69.0.3497.95 (official Build) (64-bit)
Platform 10895.56.0 (Official Build) stable-channel cyan
Firmware Google_Cyan.7287.57.180

Connected to external monitor in dock mode (lid closed), external monitor screen randomly black out.
Used giant mouse cursor since day 1 on this laptop, so this fix doesn't work on me