[snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[rom1dep]

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 2.6.29.6_mdv kernel)
running $pacmd list-sinks when stuck gives :
http://pastebin.mandriva.com/13649

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
error."
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 !

Re: [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[Takashi Iwai]

At Thu, 23 Jul 2009 17:21:44 +0200,
rom1dep wrote:
> 
> 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 2.6.29.6_mdv kernel)
> running $pacmd list-sinks when stuck gives :
> http://pastebin.mandriva.com/13649
> 
> 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
> error."
> 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

This is odd.  EAGAIN is returned only at open, read/write and drain
ioctls.

Could you track with strace?


Takashi

Re: [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[rom1dep]

2009/7/23 Takashi Iwai <tiwai@suse.de>:
> At Thu, 23 Jul 2009 17:21:44 +0200,
> rom1dep wrote:
>>
>> 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 2.6.29.6_mdv kernel)
>> running $pacmd list-sinks when stuck gives :
>> http://pastebin.mandriva.com/13649
>>
>> 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
>> error."
>> 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
>
> This is odd.  EAGAIN is returned only at open, read/write and drain
> ioctls.
>
> Could you track with strace?
>
>
> Takashi
>

It wasn't easy : that big output made my config swap and finally
pulseaudio leave for "E: cpulimit.c: Received request to terminate due
to CPU overload."
but :
http://pastebin.mandriva.com/13665
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Re: [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[Colin Guthrie]

'Twas brillig, and rom1dep at 23/07/09 18:23 did gyre and gimble:
> 2009/7/23 Takashi Iwai <tiwai@suse.de>:
>> At Thu, 23 Jul 2009 17:21:44 +0200,
>> rom1dep wrote:
>>> 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 2.6.29.6_mdv kernel)
>>> running $pacmd list-sinks when stuck gives :
>>> http://pastebin.mandriva.com/13649
>>>
>>> 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
>>> error."
>>> 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
>> This is odd.  EAGAIN is returned only at open, read/write and drain
>> ioctls.
>>
>> Could you track with strace?
>>
>>
>> Takashi
>>
> 
> It wasn't easy : that big output made my config swap and finally
> pulseaudio leave for "E: cpulimit.c: Received request to terminate due
> to CPU overload."
> but :
> http://pastebin.mandriva.com/13665

You probably want to repost using a different pastebin... our stupid one 
cuts the posts short at some pointlessly low value... I've asked about 
this to get it made bigger but I don't know who looks after it. I'd 
recommend pastebin.com.

Col


-- 

Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/

Day Job:
   Tribalogic Limited [http://www.tribalogic.net/]
Open Source:
   Mandriva Linux Contributor [http://www.mandriva.com/]
   PulseAudio Hacker [http://www.pulseaudio.org/]
   Trac Hacker [http://trac.edgewall.org/]

Re: [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[rom1dep]

2009/7/24 Colin Guthrie <gmane@colin.guthr.ie>:
> 'Twas brillig, and rom1dep at 23/07/09 18:23 did gyre and gimble:
>> 2009/7/23 Takashi Iwai <tiwai@suse.de>:
>>> At Thu, 23 Jul 2009 17:21:44 +0200,
>>> rom1dep wrote:
>>>> 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 2.6.29.6_mdv kernel)
>>>> running $pacmd list-sinks when stuck gives :
>>>> http://pastebin.mandriva.com/13649
>>>>
>>>> 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
>>>> error."
>>>> 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
>>> This is odd.  EAGAIN is returned only at open, read/write and drain
>>> ioctls.
>>>
>>> Could you track with strace?
>>>
>>>
>>> Takashi
>>>
>>
>> It wasn't easy : that big output made my config swap and finally
>> pulseaudio leave for "E: cpulimit.c: Received request to terminate due
>> to CPU overload."
>> but :
>> http://pastebin.mandriva.com/13665
>
> You probably want to repost using a different pastebin... our stupid one
> cuts the posts short at some pointlessly low value... I've asked about
> this to get it made bigger but I don't know who looks after it. I'd
> recommend pastebin.com.
>
> Col

Or not :) the total strace takes 43Mo, I kept a few before and a few
after pulseaudio's "oops"
If it's not enough I can paste more on another pastebin but that's a
terribly big output...

>
>
> --
>
> Colin Guthrie
> gmane(at)colin.guthr.ie
> http://colin.guthr.ie/
>
> Day Job:
>   Tribalogic Limited [http://www.tribalogic.net/]
> Open Source:
>   Mandriva Linux Contributor [http://www.mandriva.com/]
>   PulseAudio Hacker [http://www.pulseaudio.org/]
>   Trac Hacker [http://trac.edgewall.org/]
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
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