[pulseaudio-tickets] [Bug 51060] Crash (segfault) in snd_pcm_area_silence()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=51060

--- Comment #6 from Tanu Kaskinen <tanuk at iki.fi> 2012-08-15 04:35:49 UTC ---
(In reply to comment #5)
> I've also ran into the same issue - crash in sndpcm_area_silence(), running
> Gentoo ~amd64. In my case though the problem was isolated to a particular
> application, ie. other apps would work fine but rhythmbox would end up crashing
> pulseaudio.
> 
> Using the workaround from Comment 4, removing "front:%f" from extra-hdmi.conf I
> was able to get rhythmbox to play songs without crashing pulseaudio, however I
> noticed that rhythmbox's volume was 0 on pavucontrol. After bumping the volume
> level up I was able to hear the music being played. What is even more curious
> though, is that I reverted the change to extra-hdmi.conf, restarted pulseaudio
> and rhythmbox was STILL working.
> 
> This leads me to believe that this bug may have something to do with the
> per-application volume level getting somehow messed up.

I find it unlikely that the problem is in the per-application volumes as such.

If you have only one stream playing, and its volume is at 0, the hardware
volume will also be set to zero (if flat volumes are enabled, like they are by
default). So, could it be that the crash happens only when alsa's softvol is
used with zero volume? Can you reproduce the crash by setting rhythmbox volume
to 0 again?

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