1271642 - [Linux] Audio is not played back on gum test page

Status: RESOLVED WORKSFORME

(Core :: Audio/Video: cubeb, defect, P3)

Description

[Petruta Horea [:phorea], Desktop QA]

[Note]:
- Issue doesn't reproduce under Win 10 64-bit and Mac OS X 10.11

[Affected versions]:
- Firefox 46 beta 4
- Aurora 48.0a2 2016-05-09
- Nightly 49.0a1 2016-05-10

[Affected platforms]:
- Ubuntu 14.04 LTS

[Steps to reproduce]:
1. Open http://mozilla.github.io/webrtc-landing/gum_test.html
2. Select Audio and choose to share the microphone 

[Expected result]:
- The sound is properly played back.

[Actual result]:
- No sound is played. (The microphone works with other apps)

[Regression range]:
- I could reproduce this on Firefox 45.0.2 so it's not a recent regression. I will search again tomorrow to see if this regressed in older builds.

Comment 1

[Andrei Vaida [:avaida]]

(In reply to Petruta Rasa [QA] [:petruta] from comment #0)
> [Regression range]:
> - I could reproduce this on Firefox 45.0.2 so it's not a recent regression.
> I will search again tomorrow to see if this regressed in older builds.

I'm adding the keywords until we know for sure what caused this.

Comment 2

[Petruta Horea [:phorea], Desktop QA]

I'm removing the keywords as this reproduces on 36.0.1 (first release where the microphone can be shared) and 42.0 (first release with audio time counter).

Comment 3

[Maire Reavy [:mreavy]]

Very like the microphone being tested is not supported by the libcubeb library (and has never been supported).  Can you tell us exactly what microphone/audio input you're using and what the pulse panel shows for audio input?  Does the same microphone/audio input work with the Chrome browser on Linux (for WebRTC calls)?  

If you can also get logs from Fx47 with NSPR_LOG_MODULES=MediaManager:4,GetUserMedia:4 NSPR_LOG_FILE=some_tmp_file, that would help (the same logs from 48 might help as well).  See https://wiki.mozilla.org/Media/WebRTC/Logging

Thanks.

Comment 4

[Randell Jesup [:jesup] (needinfo me)]

(In reply to Petruta Rasa [QA] [:petruta] from comment #2)
> I'm removing the keywords as this reproduces on 36.0.1 (first release where
> the microphone can be shared) and 42.0 (first release with audio time
> counter).

While the current gum test page may not work before 36, mozGetUserMedia has worked (and the then-current gum_test patch) since around Firefox 22

Comment 5

[Petruta Horea [:phorea], Desktop QA]

Turned out it was my system that had issues, as I've got the same results with 4 different headsets (Chrome too). After some updates, installs, reboots etc I could clearly hear the audio output.

Sorry for the trouble.