Hi!

We are experiencing problems with the alsa driver when we play a stream
_constantly_ for over 3 hours with ogg123 .  First we noticed the
problem using a
MAudio Delta 44 board (00:14.0 Multimedia audio controller: IC Ensemble
Inc ICE1712 [Envy24] (rev 02)
) using oss emulation. The music plays well in the beginning but after
about 3 hours and twenty minutes noise (small interrupts) is heard in
the sound every second. It sounds like the problem is a buffer underrun.
We then did the same test with the onboard via sound card (00:11.5
Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio
Controller (rev 40)) but without the oss emulation the result was
heavily distorted sound (couldn't hear the music at all) after roughly
the same period of time.

There is a similar problem when running "arecord -f cd | aplay -f cd".
At first the programs complains about buffer under- and overrun and
after a couple of hours the program terminates with a "broken pipe"
message. All this together has made us be believe that the problem lies
in the alsa driver. Right or wrong? Perhaps someone can point us in the
right direction.

The driver we are currently using is the one in linux kernel 2.6.5 but
we have experienced this problem with earlier versions of the alsa
driver and kernel 2.4 as well.

Is this a known problem? Does anyone know about tweaks or patches to get
rid of the problem?

Regards,
Fredrik



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