[alsa-devel] [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

rom1dep rom1dep at gmail.com
Thu Jul 23 17:21:44 CEST 2009

Hello !
I am encountering some issues with pulseaudio : after some time and
for no evident reason PA stops routing the sound.
That's what I get with $pulseaudio -vvv :
http://pastebin.mandriva.com/13648 (got from a kernel)
running $pacmd list-sinks when stuck gives :

Our pulseaudio integrator Colin Guthrie concluded :
"OK, so what is happening is that some alsa level problem is occurring
(due to mmap). Pulse tries to recover from this but cannot. The alsa
sink (and the whole card) is subsequently unloaded due to this fatal
And now.. a quick paste from irc :
"[00:44:20] <coling> Jul 22 14:04:29 <mezcalero>     coling: driver
issue i am pretty sure
[00:44:20] <coling> Jul 22 14:04:33 <mezcalero>     i saw that before once
[00:44:20] <coling> Jul 22 14:04:55 <mezcalero>     coling: i.e.
EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit
[00:44:23] <coling> Jul 22 14:05:08 <mezcalero>     coling: needs to
be brought to attention of alsa folks i guess
[00:44:30] <coling> That's what I was told."

I'm now on 2.6.30 and I can reproduce that bug, then I'm bringing that
to you ! :)

Thanks !

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