Re: SWsuspend in 2.6.9 - sound card does not work

[Jan Kasprzak <kas@fi.muni.cz>]

Pavel Machek wrote:
: Hi!
: 
: > I have an Asus M6R laptop (http://www.fi.muni.cz/~kas/m6r/) with ATI IXP
: > integrated sound card. Under 2.6.8.1 I was able to use the sound card
: > after software suspend (just had to restore mixer settings using alsactl).
: > With 2.6.9 the sound card does not work after suspend/restore: No output no
: > matter how I change mixer settings, and the playback is not timed properly
: > (e.g. when mplayer tries to synchronize audio and video stream, the video
: > goes too fast using all CPU time and no output to speakers/phones.
: > 
: > 	I will do a binary search over 2.6.9-pre patches, but I want to ask
: > whether this problem looks familiar to anybody.
: > 
: 
: Are there any changes in the sound module?

	Yes, the difference is between 2.6.9-rc1 (works) and -rc2 (does not
work). Removing the snd-atiixp module after resume and inserting it
back again helps, but this means killing every app which uses audio
interface (so you cannot keep mplayer running over suspend/resume cycle,
and gnome-settings-daemon keeps /dev/mixer opened all the time too).

	I have tried to add printk() to
linux/sound/pci/atiixp.c:snd_atiixp_suspend() and _resume(), but I cannot
see it in dmesg(8) output after resume. Maybe those functions are not
called at all in 2.6.9-rc2 and newer.

-Yenya

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
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