Re: integration of via668 and via8233 drivers

[Takashi Iwai <tiwai@suse.de>]

At Fri, 6 Sep 2002 03:08:40 -0400 (EDT),
Pavel Roskin wrote:
> 
> The diff between those time pints is fairly large, since "Scatter-Gather 
> PCM access" was introduced in between:
> 
> revision 1.20
> date: 2002/07/19 17:10:53;  author: tiwai;  state: Exp;  lines: +157 -206
> added the support of sg buffer pcm
> 
> However, I can take the old (17:00) via686 driver and compile it with the
> new (17:15) source tree, and everything is fine.  My interpretation is
> that it's not the introduction of Scatter-Gather PCM access that broke the
> driver.  It's porting of the via686 driver to Scatter-Gather that caused
> the problem.
> 
> The "helicopter sound" can be reproduced with the "play" test from the 
> oss-test suite.  The sound is different if I run the test more than once.
> 
> It's interesting that the problem seems to mostly affect some programs but
> not the others.  That's what I tested with the new, broken driver:
> 

i think esd tries to set too small fragment size.
anyway, could you check the output of
/proc/asound/card0/pcm0p/sub0/hw_params for each bad case?


> timidity -Oe ode2joy.mid                           Bad
> timidity -Od -o /dev/dsp ode2joy.mid               Ok
> timidity -Ou -o /dev/audio ode2joy.mid             Ok
> mpg321 -o esd bwv538.mp3                           Bad
> mpg321 -o oss bwv538.mp3                           Ok
> mpg321 -o alsa bwv538.mp3                          Ok
> aplay cow.wav                                      Bad
> sox cow.wav -t ossdsp /dev/dsp                     Ok
> cat cow.au >/dev/audio                             Ok
> xmms bwv538.mp3  (OSS driver)                      Bad
> xmms bwv538.mp3  (eSound driver)                   Bad
> timidity -Ou -o - ode2joy.mid | aplay -            Bad
> timidity -Ow -o - ode2joy.mid | aplay -            Ok

thanks,

Takashi


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