IssueTracker

Here is another set of logs from Serial #807L0N2 - https://drive.google.com/file/d/0B-Yu8rvarp_OMUxsVmFxeElRZFVuVTExTVRMMXlpelpMNUNR/view?usp=sharing
Here machine shut down or restarted during state testing.  When it rebooted she was unable to reconnect to wifi,  the box would not even appear.  Here is a video of the issue.  https://drive.google.com/file/d/11TzZfbYmsVe5-6Ptw7_C1zOdp8m6d3iY/view?usp=sharing

+Kirtika

I've seen this in the logs:
2019-04-08T12:14:55.143280-04:00 INFO shill[1187]: [INFO:service.cc(391)] Service 0: state Connected -> Online
2019-04-08T12:14:55.143310-04:00 INFO shill[1187]: [INFO:manager.cc(1500)] Service 0 updated; state: Online failure Unknown
2019-04-08T12:14:55.159672-04:00 INFO shill[1187]: [INFO:manager.cc(1748)] Default physical service: 0 (connected)
2019-04-08T12:14:55.159980-04:00 INFO shill[1187]: [INFO:service.cc(305)] Suppressed autoconnect to service 2 (no endpoints)
2019-04-08T12:15:20.185833-04:00 WARNING shill[1187]: [WARNING:traffic_monitor.cc(226)] DNS queries failing, out-of-credits?
2019-04-08T12:18:01.553714-04:00 INFO shill[1187]: [INFO:service.cc(305)] Suppressed autoconnect to service 2 (no endpoints)
2019-04-08T12:18:01.565978-04:00 INFO shill[1187]: [INFO:wifi_service.cc(798)] Rep ep updated for 10. [SSID=Champion Guests], bssid: 44:1e:98:3f:79:c8, sig: -57, sec: rsn, freq: 2437
2019-04-08T12:18:01.574537-04:00 INFO shill[1187]: [INFO:wifi_service.cc(798)] Rep ep updated for 1. [SSID=Champion_Teacher], bssid: 44:1e:98:7f:79:c8, sig: -57, sec: rsn, freq: 2437
2019-04-08T12:18:01.590269-04:00 INFO shill[1187]: [INFO:wifi_service.cc(798)] Rep ep updated for 10. [SSID=Champion Guests], bssid: 44:1e:98:3f:7a:cc, sig: -69, sec: rsn, freq: 5680
2019-04-08T12:18:01.590668-04:00 INFO shill[1187]: [INFO:wifi_service.cc(798)] Rep ep updated for 1. [SSID=Champion_Teacher], bssid: 44:1e:98:7f:7a:cc, sig: -69, sec: rsn, freq: 5680
2019-04-08T12:18:01.665794-04:00 INFO shill[1187]: [INFO:service.cc(289)] Service 10 destroyed.
2019-04-08T12:18:01.667270-04:00 INFO shill[1187]: [INFO:service.cc(305)] Suppressed autoconnect to service 1 (no endpoints)
2019-04-08T12:18:01.667294-04:00 INFO shill[1187]: [INFO:service.cc(305)] Suppressed autoconnect to service 2 (no endpoints)
2019-04-08T12:18:35.171405-04:00 INFO shill[1187]: [INFO:wifi_service.cc(798)] Rep ep updated for 0. [SSID=Champion_Student], bssid: 44:1e:98:bf:7a:4c, sig: -60, sec: rsn, freq: 5620
2019-04-08T12:20:31.990537-04:00 INFO shill[1187]: [INFO:manager.cc(2189)] Creating Connectivity Report

Service 0 seems to be the managed Champion_Student.
IIUC it's connected at that time.

The other thing that I've seen a few times looks like

2019-04-08T12:14:42.575453-04:00 INFO shill[1187]: [INFO:wifi.cc(1976)] OnBeforeSuspend: connected
2019-04-08T12:14:42.578523-04:00 INFO shill[1187]: [INFO:result_aggregator.cc(53)] Error type org.chromium.flimflam.Error.Success: Success (no error) reported
2019-04-08T12:14:42.578557-04:00 INFO shill[1187]: [INFO:manager.cc(1830)] Finished suspend actions. Result: org.chromium.flimflam.Error.Success: Success (no error)
2019-04-08T12:14:42.578695-04:00 INFO shill[1187]: [INFO:chromeos_power_manager_proxy.cc(247)] ReportSuspendReadinessInternal(60686337, 60686339, dark=false)
2019-04-08T12:14:51.393478-04:00 NOTICE wpa_supplicant[535]: wlan0: CTRL-EVENT-DISCONNECTED bssid=44:1e:98:bf:7a:4c reason=3 locally_generated=1
2019-04-08T12:14:51.393864-04:00 ERR wpa_supplicant[535]: nl80211: Failed to open /proc/sys/net/ipv4/conf/wlan0/drop_unicast_in_l2_multicast: No such file or directory
2019-04-08T12:14:51.393877-04:00 ERR wpa_supplicant[535]: nl80211: Failed to set IPv4 unicast in multicast filter
2019-04-08T12:14:51.396846-04:00 INFO shill[1187]: [INFO:wifi.cc(875)] WiFi wlan0 supplicant updated DisconnectReason to -3
2019-04-08T12:14:51.400138-04:00 ERR shill[1187]: [ERROR:wifi.cc(988)] Disconnected due to inability to connect to the service.
2019-04-08T12:14:51.400258-04:00 INFO shill[1187]: [INFO:service.cc(391)] Service 0: state Online -> Failure
2019-04-08T12:14:51.400285-04:00 INFO shill[1187]: [INFO:manager.cc(1500)] Service 0 updated; state: Failure failure out-of-range
2019-04-08T12:14:51.400745-04:00 INFO shill[1187]: [INFO:service.cc(391)] Service 0: state Failure -> Idle
2019-04-08T12:14:51.400814-04:00 INFO shill[1187]: [INFO:manager.cc(1500)] Service 0 updated; state: Idle failure Unknown
2019-04-08T12:14:51.402070-04:00 INFO shill[1187]: [INFO:dhcp_config.cc(211)] Stopping 9600 (ReleaseIP)

But that seems to be a disconnect because of getting out of range of the network, correct?

+Denis as OOBE expert -- have you seen something like the video in Comment #2, where the user is not getting any reaction when clicking on the "tray" on the OOBE screen?

Assigning to you Kirtika to kindly take a look if you can see any wifi issues in the logs except for "standard" out of range.
Feel free to reassign back.
Thanks!

Re #5: Actually that widget not a part of OOBE webui / login screen, but rather is handled by ash system tray.

Is there an update on this?

Still happening to me too

Platform
12105.68.0 (Official Build) beta-channel lulu
Firmware
Google_Lulu.6301.136.57
Channel
Currently on beta

I am seeing this on Lenovo N42, HP G5, Chrome version 73.0.3683.114

We have started a new school year and are having the exact same problem with the same user.  Even created a brand new user account and still same result. No one else is affected.

Here are the logs

The prior two notes we added under the incorrect email address.  The original issue is still occurring with the same user.  No issues with the rest of the school.  

Just double-checking: The particular user is in the same OU as other users?
Does it happen to the same user on another hardware?

Yes and yes

The user took the machine home and was more successful than at school but did loose connection (the wifi toggled off) once when clicking on a hyperlink from a doc assigned in a classroom.  This is consistent with past disconnects at school.  Classroom and hyperlinks in docs have consistently been an issue for this user.  Here are the logs that include the time the user was at home gathering data.

Seems to be a bug in channel switching code.

I recently bought a chromebook that experiences this issue (drops every 10-15 mins) and found the drops occur precisely when my router's wifi congestion avoidance switches radio channels.  I then configured my wireless router to use a fixed channel rather than "auto", and have not experienced a single dropped connection since.  

There has been no update for quite sometime. Is anyone still encountering this issue?

I am still seeing this issue with all different chromebooks. The issue seems to happen as we migrate from one AP to another (roaming).  Any chome Google Team?

Just encountered this disconnect issue again today on a Dell 3180 / Chrome OS 87.0.4280.109. Toggling WiFi off/on again resolves it in short order every time. This was at home where my 2.4Ghz and 5Ghz networks are broadcast under separate names and use fixed channels. System log dump from chrome://network attached that was taken immediately after the disconnect occurred.

Hp chromebook 14. Newest stable os version. Wifi will drop. With no warning. When clicking the clock button. The wifi network will be gone and it will say wifi is on.

But show no networks or anything. Then suddenly pop back into my home network and reconnect in an instant.

Total down time is between 20 and 30 seconds. But it happens very frequently. Enough so to cause me to come here seeking some fixes

I was having the same issue and was convinced is had to do with the type of internet I have, which has 2.4GHz and  5GHz signals and switches between them intermittently (in some way based on performance).
#16 might have hit this nail on the head.