IssueTracker

lblb636@ Thanks for reporting this bug. I just want to confirm that the issue is the call device button being not responsive according to the uploaded video. It seems like this issue only happened on Windows.

Another similar issue that's related https://b.corp.google.com/issues/226426377

RE#4 I need to try this on Windows laptop first and I couldn't repro on MacOS or Linux. But I think this is most likely related to the modem simulator we introduced for API 31. Will need to further investigate.

I reproduced this bug on Windows with emulator version 31.2.10-8420304

Found the root cause when the "call device" button was unresponsive. It became unresponsive because the inbound call failed to initialize. Basically, the modem simulator's shared FD failed. When receive_inbound_call is invoked, it is supposed to make connection to the "host server" via a shared fd but it is flaky on Windows unfortunately.

modem-simulator: receive_inbound_call:101 inbound call from 6505551212
modem-simulator: process_msgs:296 waiting for new messages ...
modem-simulator: main_host_thread:501 got connection at host server at 65094
modem-simulator: start_calling_thread:254 making a connection to main host server 65094
modem-simulator: main_host_thread:507 Detected close from the other side
modem-simulator: start_calling_thread:262 nothing read quit
modem-simulator: main_host_thread:494 looping at main host server at 65094
modem-simulator: start_calling_thread:284 done with this thread

RE#12 I have uploaded a patch to fix this issue. I don't think it's the same reason for https://issuetracker.google.com/issues/233123301

RE#14 This issue is for API 31+, I will check for API 32 and API 33. Thanks for reminding me.

The fix has been merged in both 31 release and 32 release for since 05/2022.

AUD_open_in (as well as _out) is called twice: in goldfish_audio and in hda.

#0  AUD_open_out (card=card@entry=0x7b1f178, sw=sw@entry=0x0, name=0x2759e5 "goldfish_audio", callback_opaque=callback_opaque@entry=0x7b1ed00, 
    callback_fn=0x1155300 <goldfish_audio_callback>, as=as@entry=0x7fffe03b3fc0) at ../audio/audio_template.h:399
#1  0x0000000001155208 in goldfish_audio_realize (dev=<optimized out>, errp=<optimized out>) at ../hw/audio/goldfish_audio.c:450
#2  0x0000000001176890 in device_set_realized (obj=<optimized out>, value=true, errp=0x7fffe03b4118) at ../hw/core/qdev.c:852
#3  0x0000000001247fdc in property_set_bool (obj=0x7b1ed00, v=<optimized out>, name=<optimized out>, opaque=0x7a4b210, errp=0x7fffe03b4118)
    at ../qom/object.c:1923
#4  0x00000000012498ed in object_property_set_qobject (obj=0x7b1f178, value=<optimized out>, name=0x2759e5 "goldfish_audio", errp=0x7b1ed00)
    at ../qom/qom-qobject.c:27
#5  0x00000000012467cc in object_property_set_bool (obj=0x7b1f178, value=<optimized out>, name=0x2759e5 "goldfish_audio", errp=0x7b1ed00)
    at ../qom/object.c:1188
#6  0x000000000117541f in qdev_init_nofail (dev=dev@entry=0x7b1ed00) at ../hw/core/qdev.c:339
#7  0x0000000001177ef3 in sysbus_create_varargs (name=<optimized out>, addr=addr@entry=4278267904) at ../hw/core/sysbus.c:226
#8  0x0000000001083cf0 in sysbus_create_simple (name=0x7b1f178 " \263\244\a", addr=4278267904, irq=0x2759e5) at ../include/hw/sysbus.h:111
#9  pc_init1 (machine=0x3b25880, host_type=<optimized out>, pci_type=<optimized out>) at ../hw/i386/pc_piix.c:288
#10 0x000000000116fa72 in machine_run_board_init (machine=0x3b25880) at ../hw/core/machine.c:829
#11 0x000000000109b4c5 in main_impl (argc=<optimized out>, argv=<optimized out>, 
    on_main_loop_done=0x10959a0 <enter_qemu_main_loop(int, char**)::$_4::__invoke()>) at ../vl.c:5533
#12 0x0000000001097746 in run_qemu_main (argc=129102200, argv=0x0, on_main_loop_done=0x2759e5) at ../vl.c:3360
#13 0x0000000001092c3a in enter_qemu_main_loop (argc=112, argv=0x3b24e00) at ../android-qemu2-glue/main.cpp:731
#14 0x00007ffff7320233 in QThreadPrivate::start (arg=0x3a9a420)
    at /usr/local/google/home/wdu/build-qt/src/qt-everywhere-src-5.12.1/qtbase/src/corelib/thread/qthread_unix.cpp:361
#15 0x00007ffff79d4d80 in start_thread (arg=0x7fffe03b5640) at pthread_create.c:481
#16 0x00007ffff6396bdf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

#0  AUD_open_in (card=card@entry=0x7b1f178, sw=sw@entry=0x0, name=0x392aaf "goldfish_audio_in", callback_opaque=callback_opaque@entry=0x7b1ed00, 
    callback_fn=0x11554a0 <goldfish_audio_in_callback>, as=as@entry=0x7fffe03b3fc0) at ../audio/audio_template.h:399
#1  0x0000000001155280 in goldfish_audio_realize (dev=<optimized out>, errp=<optimized out>) at ../hw/audio/goldfish_audio.c:471
#2  0x0000000001176890 in device_set_realized (obj=<optimized out>, value=true, errp=0x7fffe03b4118) at ../hw/core/qdev.c:852
#3  0x0000000001247fdc in property_set_bool (obj=0x7b1ed00, v=<optimized out>, name=<optimized out>, opaque=0x7a4b210, errp=0x7fffe03b4118)
    at ../qom/object.c:1923
#4  0x00000000012498ed in object_property_set_qobject (obj=0x7b1f178, value=<optimized out>, name=0x392aaf "goldfish_audio_in", errp=0x7b1ed00)
    at ../qom/qom-qobject.c:27
#5  0x00000000012467cc in object_property_set_bool (obj=0x7b1f178, value=<optimized out>, name=0x392aaf "goldfish_audio_in", errp=0x7b1ed00)
    at ../qom/object.c:1188
#6  0x000000000117541f in qdev_init_nofail (dev=dev@entry=0x7b1ed00) at ../hw/core/qdev.c:339
#7  0x0000000001177ef3 in sysbus_create_varargs (name=<optimized out>, addr=addr@entry=4278267904) at ../hw/core/sysbus.c:226
#8  0x0000000001083cf0 in sysbus_create_simple (name=0x7b1f178 " \263\244\a", addr=4278267904, irq=0x392aaf) at ../include/hw/sysbus.h:111
#9  pc_init1 (machine=0x3b25880, host_type=<optimized out>, pci_type=<optimized out>) at ../hw/i386/pc_piix.c:288
#10 0x000000000116fa72 in machine_run_board_init (machine=0x3b25880) at ../hw/core/machine.c:829
#11 0x000000000109b4c5 in main_impl (argc=<optimized out>, argv=<optimized out>, 
    on_main_loop_done=0x10959a0 <enter_qemu_main_loop(int, char**)::$_4::__invoke()>) at ../vl.c:5533
#12 0x0000000001097746 in run_qemu_main (argc=129102200, argv=0x0, on_main_loop_done=0x392aaf) at ../vl.c:3360
#13 0x0000000001092c3a in enter_qemu_main_loop (argc=112, argv=0x3b24e00) at ../android-qemu2-glue/main.cpp:731
#14 0x00007ffff7320233 in QThreadPrivate::start (arg=0x3a9a420)
    at /usr/local/google/home/wdu/build-qt/src/qt-everywhere-src-5.12.1/qtbase/src/corelib/thread/qthread_unix.cpp:361
#15 0x00007ffff79d4d80 in start_thread (arg=0x7fffe03b5640) at pthread_create.c:481
#16 0x00007ffff6396bdf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

#0  AUD_open_out (card=0x5086388, sw=0x0, name=0x2d9383 "dac", callback_opaque=callback_opaque@entry=0x50863a8, 
    callback_fn=0x1156820 <hda_audio_output_cb>, as=as@entry=0x50863d4) at ../audio/audio_template.h:399
#1  0x000000000115677f in hda_audio_setup (st=0x50863a8) at ../hw/audio/hda-codec.c:288
#2  0x0000000001156c8d in hda_audio_init (hda=hda@entry=0x5086300, desc=<optimized out>) at ../hw/audio/hda-codec.c:520
#3  0x0000000001156e34 in hda_audio_init_duplex (hda=0x5086300) at ../hw/audio/hda-codec.c:640
#4  0x00000000011590c3 in hda_codec_dev_realize (qdev=<optimized out>, errp=0x7fffe03b4288) at ../hw/audio/intel-hda.c:69
#5  0x0000000001176890 in device_set_realized (obj=<optimized out>, value=true, errp=0x7fffe03b4378) at ../hw/core/qdev.c:852
#6  0x0000000001247fdc in property_set_bool (obj=0x5086300, v=<optimized out>, name=<optimized out>, opaque=0x9604650, errp=0x7fffe03b4378)
    at ../qom/object.c:1923
#7  0x00000000012498ed in object_property_set_qobject (obj=0x5086388, value=<optimized out>, name=0x2d9383 "dac", errp=0x50863a8)
    at ../qom/qom-qobject.c:27
#8  0x00000000012467cc in object_property_set_bool (obj=0x5086388, value=<optimized out>, name=0x2d9383 "dac", errp=0x50863a8)
    at ../qom/object.c:1188
#9  0x000000000117541f in qdev_init_nofail (dev=0x5086300) at ../hw/core/qdev.c:339
#10 0x000000000115713c in intel_hda_and_codec_init (bus=<optimized out>) at ../hw/audio/intel-hda.c:1355
#11 0x00000000011594d6 in soundhw_init () at ../hw/audio/soundhw.c:151
#12 0x000000000109b514 in main_impl (argc=<optimized out>, argv=<optimized out>, 
    on_main_loop_done=0x10959a0 <enter_qemu_main_loop(int, char**)::$_4::__invoke()>) at ../vl.c:5554
#13 0x0000000001097746 in run_qemu_main (argc=84435848, argv=0x0, on_main_loop_done=0x2d9383) at ../vl.c:3360
#14 0x0000000001092c3a in enter_qemu_main_loop (argc=112, argv=0x3b24e00) at ../android-qemu2-glue/main.cpp:731
#15 0x00007ffff7320233 in QThreadPrivate::start (arg=0x3a9a420)
    at /usr/local/google/home/wdu/build-qt/src/qt-everywhere-src-5.12.1/qtbase/src/corelib/thread/qthread_unix.cpp:361
#16 0x00007ffff79d4d80 in start_thread (arg=0x7fffe03b5640) at pthread_create.c:481
#17 0x00007ffff6396bdf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

#0  AUD_open_in (card=0x5086388, sw=0x0, name=0x392af6 "adc", callback_opaque=callback_opaque@entry=0x50864f8, 
    callback_fn=0x1155910 <hda_audio_input_cb>, as=as@entry=0x5086524) at ../audio/audio_template.h:399
#1  0x000000000115680c in hda_audio_setup (st=0x50864f8) at ../hw/audio/hda-codec.c:293
#2  0x0000000001156c8d in hda_audio_init (hda=hda@entry=0x5086300, desc=<optimized out>) at ../hw/audio/hda-codec.c:520
#3  0x0000000001156e34 in hda_audio_init_duplex (hda=0x5086300) at ../hw/audio/hda-codec.c:640
#4  0x00000000011590c3 in hda_codec_dev_realize (qdev=<optimized out>, errp=0x7fffe03b4288) at ../hw/audio/intel-hda.c:69
#5  0x0000000001176890 in device_set_realized (obj=<optimized out>, value=true, errp=0x7fffe03b4378) at ../hw/core/qdev.c:852
#6  0x0000000001247fdc in property_set_bool (obj=0x5086300, v=<optimized out>, name=<optimized out>, opaque=0x9604650, errp=0x7fffe03b4378)
    at ../qom/object.c:1923
#7  0x00000000012498ed in object_property_set_qobject (obj=0x5086388, value=<optimized out>, name=0x392af6 "adc", errp=0x50864f8)
    at ../qom/qom-qobject.c:27
#8  0x00000000012467cc in object_property_set_bool (obj=0x5086388, value=<optimized out>, name=0x392af6 "adc", errp=0x50864f8)
    at ../qom/object.c:1188
#9  0x000000000117541f in qdev_init_nofail (dev=0x5086300) at ../hw/core/qdev.c:339
#10 0x000000000115713c in intel_hda_and_codec_init (bus=<optimized out>) at ../hw/audio/intel-hda.c:1355
#11 0x00000000011594d6 in soundhw_init () at ../hw/audio/soundhw.c:151
#12 0x000000000109b514 in main_impl (argc=<optimized out>, argv=<optimized out>, 
    on_main_loop_done=0x10959a0 <enter_qemu_main_loop(int, char**)::$_4::__invoke()>) at ../vl.c:5554
#13 0x0000000001097746 in run_qemu_main (argc=84435848, argv=0x0, on_main_loop_done=0x392af6) at ../vl.c:3360
#14 0x0000000001092c3a in enter_qemu_main_loop (argc=112, argv=0x3b24e00) at ../android-qemu2-glue/main.cpp:731
#15 0x00007ffff7320233 in QThreadPrivate::start (arg=0x3a9a420)
    at /usr/local/google/home/wdu/build-qt/src/qt-everywhere-src-5.12.1/qtbase/src/corelib/thread/qthread_unix.cpp:361
#16 0x00007ffff79d4d80 in start_thread (arg=0x7fffe03b5640) at pthread_create.c:481
#17 0x00007ffff6396bdf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

BTW, I am migrating us to virtio-snd, it does not open the microphone for no reason (it has other problems so far and disabled).

Not opening the microphone at all is definitely a strategy. I don't think many people actually do record sound with the emulator (but happy to be proven wrong). Or perhaps adding a default-off checkbox in the emulator settings to explicitly enable the microphone only when actually needed could be another way to go.

I suspect there could be a reason (probably not a very good one) why sound cards are implemented this way. I tried to delay opening output streams and got audio issues (audio stops and restarts every few milliseconds because the kernel detects XRUN because some global variables compare in a certain way) similar to what I am having in virtio-snd currently. So, I made virtio-snd to work like hda and audio was clear.

I'm sorry but I only have high level knowledge of this stuff so I can't help much when it comes to linux drivers. But I'll be happy to try out any pre-release should this be of help!

I believe this is not a kernel, but some weird assumptions in qemu which break if we open a device moments before using it or in a wrong thread. If you happen to have a linux machine and willing to build and play with our emulator, we will be happy to take a patch from you :) From here I will be working on virtio-snd first and then I will try to figure out if we can delay opening stream to the point where they are needed. Or maybe we could just introduce -no-microphone.

This looks like not an easy issue to fix! ... as these bugs could resurface back after some time.

I agree :(

we could disable mic by default

If we go this way, we probably want to add an option to disable it.

If we go this way, we probably want to add an option to disable it.

This also works, at least we could disable mic manually and have the sound quality back. Do you think you could use it as a short term fix while you are looking for a better solution?

a short term fix while you are looking for a better solution?

I'll talk about it on our weekly meeting on Tuesday.

dm...@gmail.com this is a complex project and it's not an easy job to keep it bug-free. I clearly see it's improving and onboarding more features. I also have a chance to work with Xcode and believe me - Android studio is way way better than apple's product - refactoring, hotkeys out of the box, WYSIWIG and overall performance are just a few areas with a big difference

I found a TODO: Be able to disable audio input/output separately but so far I can't figure out how to pass a runtime value into the sound card init functions (goldfish_audio_realize, hda_audio_setup).

I figured out how to pass runtime values into virtio-snd and hda-duplex, we should be able to avoid opening the microphone in those devices. When I tried the same with goldfish_audio, the QEMU says -device goldfish_audio,debug=42: Parameter 'driver' expects pluggable device type. We probably want to retire (not sure if we can just disable it) this device instead of hacking it further.

I merged a change to disable the microphone in Intel HDA and virtio-snd. Not sure how we can disable it goldfish_sound in a proper way. We probably want to disable it unconditionally.

"Sounds like" (pun intended) a very good improvement! BTW: What decides which audio driver to use (I mean with which logic virtio-snd or hda-duplex or goldfish_audio is used) ?

What decides which audio driver to use?

virtio-snd is a drop-in replacement for Intel HDA, but the linux driver is required. If the system image says it has the driver, then we use the virtio-snd device, otherwise we use some ancient magic to decide between Intel HDA and goldfish_audio.

if this fix will apply to me (I'm using an M1 mac) and

Yes, it will apply for Apple M1.

when the fix will go out?

I still need to figure out what to do with goldfish_audio if our leads will not buy my change to disable the microphone permanently on goldfish_audio. One everything is merged, we should release the changes into the canary channel in weeks.

Cool thanks!

If the system image says it has the driver, then we use the virtio-snd device

Do you know from which API do system images ship with the linux virtio driver?

T is the first system image with virtio-snd drivers.

Super! To sum it up: with any emu image with at least api26 the mic will obey the hw.audioInput setting in the .ini file otherwise (for older emu images) the mic will always be disabled. Correct?

Unfortunately we create the goldfish_audio device unconditionally, it is not even a sound card from the qemu point of view, it just happens to call the audio API. I disabled the microphone in goldfish_audio here, so old API levels on ARM will not have a microphone until we figure out a better approach.

All changes are merged and available in the 8513367 emulator build. I checked our system images, on x86 the microphone issue should be fixed on API23 and later, on arm ones - API29 and later. We will see if we can fix our older arm system images (API28 and older).

To disable the microphone you want to add hw.audioInput=no to config.ini in the AVD folder.

Following along from #43, I figured I should mention I recently opensourced the tool I built to quickly enable and disable the hw.audio* (and other) settings on the various emulators I use for day to day development: https://github.com/morris86/avdedit

A checkbox just makes life a bit easier than constantly going in and hand editing .ini files.

Thanks for your work on this ticket and #37095756 over the last couple of years, appreciate it.

All changes are merged and available in the 8513367 emulator build.

Is this build downloadable somewhere?

Is there a target version in which we can expect this fix to land in (I'm currently using emulator v 31.3.2)?

Is this build downloadable somewhere?

While there is nothing secret there, I am not sure how to share it with you until we release the usual way.

Is there a target version

I don't know yet. Our emulator version is something like 31.3.7-8408431, the build number is after the dash.

Thank you, I was able to access a build and I could verify on my machine that the issue has been resolved. thank you very much everyone again for listening to our comments until here!

Hello, emulator 31.3.8 build 8598121 just landed in the canary channel. Can you please check if it includes this fix? Writing hw.audioInput=no in config.ini and using an API32 image still produces the BT audio switch when launching the emu.

Got log says 31.3.8 should include my change to fix this issue. Unfortunately I am out of the office and cannot check this.

I confirm, 8513367 does not affect BT audio quality, while 8598121 does affect.

It looks like I was late for two days for 31.3.8:

https://android-review.googlesource.com/c/platform/external/qemu/+/2056841 - 31.3.8 https://android-review.googlesource.com/c/platform/external/qemu/+/2078228 - my change

The fix should be in the next emulator version.

Here is what happened: the last time we cut a new release was April, 4. Since then we have been doing cherry-picks which I have not requested before. With the cherry-picks requested this fix is available in 31.3.9 which should be published by the end of this week or the next week.

Ranjit, could you please confirm this fix is available in 31.3.9?

You need bluetooth headphones for it.

1. Connect the headphones to the host.
2. Start some audio on the host (e.g. a youtube video with good audio quality).
3. Coldboot an emulator (you can use any system image, e.g. S), notice host's audio quality drops when the emulator starts.
4. Add hw.audioInput=no to the AVD's config.ini.
5. Coldboot the emulator again, check if host's audio quality is unaffected.

Thank you, Ranjit.

I can confirm 31.3.9 is now available from the canary channel and that it includes this fix. Thanks a lot for making this happen!

The fix should be available on M1 as well, it is in the 31.3.9 version. What is your emulator version?

I confirm I've tested it with 31.3.9 on M1 processor and it's working.

Did you tweak the .ini file as it was explained in this long thread?

Hi Jamie, it should be fixed, please add hw.audioInput=no to AVD's config.ini file for API32 and below. It is not required for API33 and above. There are some other quirks there (in API33) as I am learning about QEMU audio API behavior (the QEMU and kernel disagree on how audio is consumed).

It is not required for API33 and above

Using API 33 but the sound quality still drops

shalva258, could you please elaborate? I just created API30 and API33 on Mac and I can hear that API30 affects audio in my bt headphones when the emulator starts and API33 does not. Maybe update the emulator? I tried on 32.1.3.

I have API 33 and Android Emulator version is 31.3.14. How did you install 32.1.3? In Android Studio it does not say there is update available. On their website latest version is 31.3.13 and I dont know how AS downloaded 31.3.14 version :D

Is not this the version that should have fixed this?

Okay I found https://developer.android.com/studio/emulator_archive and installed (32.1.7) Canary 1 version. Now it is working fine

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It's freaking 2024, the original issue from 2016 that was marked as fixed was definitely not fixed, this one wasn't either. Windows 10, using emulator 34.2.14-11834374 and this beyond intrusive problem is still there. Good luck trying to share your emulator screen on a meeting and keep your audio and mic working without problems, you won't because this insanely dumb bug is still present to this day and it takes over your audio input forcing hour headset into hands-free mode when you don't want to.

Hi particlecore,

It's freaking 2024, the original issue from 2016 that was marked as fixed

The original issue is fixed.

Good luck trying to share your emulator screen on a meeting and keep your audio and mic working without problems

This is a separate problem which we have never heard before. Please file a new bug (specify which meeting software you use).