On Sun, 29 Sep 2002, Vladimir Dergachev wrote:
>
>
> On 29 Sep 2002, Peter Osterlund wrote:
>
> > Vladimir Dergachev <[EMAIL PROTECTED]> writes:
> >
> > > On 7 Jul 2002, Sean Walker wrote:
> > >
> > > > If I try and record with an alsa device selected, I get the following
> > > > error:
> > > >
> > > > Audio reader: overrun occurred, resetting pcm device
> > > >
> > > > repeated multiple times until I stop recording. The sound system is
> > > > working just fine except for this.
> > >
> > > Try reducing the sample rate, maybe your card cannot handle it.
> >
> > I have the same problem with a 2.2GHz P4 as soon as I use the computer
> > for anything else during recording. It turns out to be caused by the
> > ALSA stop_threshold defaulting to 768, which corresponds to 16ms at a
> > 48kHz sampling rate. 16ms is much smaller than the linux scheduler can
> > handle, unless you use realtime priority and low-latency patches.
> > Increasing this threshold to something bigger fixed the problem for
> > me. 8192 was enough on my system but I don't think a big value will
> > cause any harm, so I suggest using 32768.
>
> Interestingly enough I don't have any problems and my card's default is
> 16384. I would say this is probably a bug in the alsa driver - it should
> set a reasonable default without requiring adjustments by a program that
> simply reads data.
>
> Or, maybe, I did not read some paragraph in ALSA docs.
>
> Could ALSA folks comment ?
The default stop_threshold should be equal to buffer size. It appears to
a bug. Hardware?
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project http://www.alsa-project.org
SuSE Linux http://www.suse.com
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