Hello! > > > hmm, this recalls some posts on l-k ml in the last year. > > > it might be a hardware problem, namely, VIA motherboards. > > > is your motherboard KT266A? > > > > No, it's KT-133. > > does this info help? > > http://www.networking.tzo.com/net/software/readmes/techvl019d.htm
It's a Windows driver that changes some registers of the chipset. It also reloads those registers after the sleep, so they are not saved in the hardware, so there is no way this driver can affect ALSA drivers under Linux kernel. The Linux kernel 2.4.20-pre5 that I'm using has some VIA-specific code, which does something similar to that Windows driver. Anyway, all this is most likely irrelevant. Binary search shows that the driver from "2002/07/19 17:00 UTC" is fine, but 15 minutes later, at "2002/07/19 17:15 UTC", the driver is already broken. 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: 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 -- Regards, Pavel Roskin ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
