[Webkit-unassigned] [Bug 180748] Audio sometimes fail to capture in WebRTC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180748

--- Comment #36 from daginge at confrere.com ---
To reproduce this error, do the following on iOS:

1. Kill Safari _on iOS_ to make sure you got a clean testing slate.
2. Open https://codepen.io/daginge/full/pozdrwj in a new tab
3. Accept media permissions
4. Observe that you can hear yourself with some feedback, and see that the logs say that audio is unmuted.
5. Go to home screen
6. Observe that the red pill/bar is there
7. Trigger Siri and say "Go away"
8. Observe that the red pill/bar is there
9. Trigger Siri and say "Go away"
10. Observe that the red pill is now gone
11. Go back to Safari and see that the logs show that audio was muted, but never unmuted. You can also no longer hear yourself
12. Refresh the tab, notice that getUserMedia says audio is unmuted, yet you cannot hear feedback. This tab is now broken forever. Killing Safari resets it.

I can't reliably reproduce this on all phones, some phones opening Spotify and playing audio works to trigger the audio, on some a single call to Siri will trigger it. There seems to be a race condition here.

I have also recorded this happening, you can read the logs towards the end of the video and see that audio is never unmuted. https://photos.app.goo.gl/hA9fEFSo7fF8PSny7

It took us two years, but we have finally narrowed down the bug to something reproducible!

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20190904/216b6d87/attachment.html>