Re: nforce2 (snd_intel8x0) channels scrolling

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Richard Lemon wrote:
> Hi All,
> 
> This is one of the problems I have been seeing with the intel8x0 driver as well. The problem occurs when you call snd_pcm_start a second time after an xrun, or after you have shut down a program with ctl-c and started it again in the same console. I used the 
> 
> If you close the console and open a new one the problem seems to go away!? I used the example code pcm.c from the alsa-lib test directory.
> 
> It occurs with both [nforce2 ALC650] combo and [Intel 82901EB-ICH5 Analog devices id 75].
> 
> I also have a problem when the drivers have been running for a long time (around 5 hours). Without an xrun the snd_pcm_delay() function starts returning impossible numbers. Checking drift against either rdtsc or gettimeofday() alsa starts giving me a 0.1 second per second drift.
> 
> I haven't got a machine I can set up for this style of kernel debugging unfortunately, so I am trying to code around these problems.
> 
> richard.
> 
> 
Would you be able to submit a small self contained (like the 
speaker-test code I submitted) source code that would reproduce the 
problem quickly.
I would expect that writing code to force xruns would be quite easy.
I have a ICH5 with ALC650 chip on Motherboard here, so I might be able 
to help you out if I could reproduce your problem.

Cheers
James




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