713658 - Audio thread prevents Firefox process from exiting

Status: NEW

(Core :: Audio/Video: Playback, defect)

Description

[Kaz Nishimura]

Attachment: A stack trace of a thread probably causing a deadlock

The firefox.exe process remains forever (at least more than hours) after I selected "Exit" from the menu bar.  It uses 50% of my dual core machine's CPU time.  By attaching the Visual Studio debugger to the process, I can confirm an audio thread keeps running.

The steps to reproduce:
1) Connect a USB audio device and make it the default one.
2) Start Firefox in Safe Mode with a new profile.
3) Disconnect the audio device and connect again.
4) Visit a page with an audio tag such as http://moztw.org/demo/audioplayer/ and make the audio play back.
5) Leave the page and select "Exit" from the menu bar.

Probably Firefox does not handle device disconnetion properly and causes a deadlock.

Comment 1

[Mats Palmgren (inactive)]

Bug 712792?

Comment 2

[Kaz Nishimura]

Attachment: A correct stack trace of the ever running thread

I am sorry that the first attachment is not of the running thread but of a thread probably causing a deadlock.  This is the correct stack trace of the ever running thread.

Comment 3

[Kaz Nishimura]

(In reply to Mats Palmgren [:mats] from comment #1)
> Bug 712792?

It seems quite similar.  Feel free to mark as duplicate.

Comment 4

[Matthew Gregan [:kinetik]]

What page/video did this happen with, and do you have a way to reproduce it?

Comment 5

[Kaz Nishimura]

(In reply to Matthew Gregan [:kinetik] from comment #4)
> What page/video did this happen with, and do you have a way to reproduce it?

As described in the original report, I can reproduce this problem with http://moztw.org/demo/audioplayer/ .  But it requires you to disconnect/reconnect the default audio device while Firefox is running.  Automatic device disconnection may also happen when the system goes into standby.

Comment 6

[Matthew Gregan [:kinetik]]

Sorry, not sure how I missed that.  Thanks!

Comment 7

[Matthew Gregan [:kinetik]]

Reproducible on Windows 7 by disabling and enabling the output device via the Sound control panel, so there's no need for a USB device to reproduce this.

Comment 8

[Kaz Nishimura]

Bug 714078 seems to have a patch, which will also fix this bug, I hope.

Comment 9

[Kaz Nishimura]

I do not see this problem with recent versions. I think this problem has been fixed now.