I can confirm this bug on arch64.

I've tried somethings and I'm not sure what fixed it, but you should start running alsaconf from the alsa-utils package. We can try other things if it does not work.

Sorry, but running alsaconf did _not_ fix it here.

It didn't work for me after rebooting and suspending... But this worked and you may try:

# fuser -k /dev/snd/*
# aconnect --removeall
# rmmod snd_hda_intel
# modprobe snd_hda_intel

Check your volume levels and see if works. Then we can think of a way to do it automatically.

By the way, my audio card is:
# lspci | grep Audio
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)

This would be only a (dirty) workaround.
I don't want to kill my apps !
I will stay with 2.6.24 until this is getting fixed (upstream).
Thank you anyway.
( Tip: If you realy want to do it automatically,
put a scriptlet into /etc/pm/sleep.d/ - some examples are in /usr/lib/pm-utils/sleep.d/
and maybe a config file into /etc/pm/config.d/ - example is /usr/lib/pm-utils/defaults )

I've read specifying the model parameter when loading the module solves the problem. If I find the correct model I'll let you know.

I solved my problem! I created /etc/modprobe.d/sound as follows (maybe only the first line is needed, the rest were created by alsaconf):

options snd-hda-intel model=3stack-dig
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel

Reload the module as in the dirty workaround or do a clean reboot. The following models are available: http://www.mjmwired.net/kernel/Documentation/sound/alsa/ALSA-Configuration.txt

I find out my card was ALC883 looking at everything.log (not at lspci output). There was "hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...".

Wow ! that really did the trick ! Thank you very much !

I found the same message about ALC883 in /var/log/messages and I even know about the model parameters in ALSA-Configuration.txt, but I never thought this would help in this case since it worked with 2.6.24 without this trick :-/

(I had to use options snd-hda-intel model=6stack-dig because I have 6 jacks on the backside of my box.)

Will report this upstream too ...

OK - patch committed upstream. Please use it (or wait for next kernel release) :)

Still not fixed with kernel26 2.6.25.6-1

Fixed in upstream release 2.6.26-rc5. See http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.26-rc5, search for "10662".

commit 07bc76dfa19b10017b518dd9aa1b2719e8c863de
Author: Takashi Iwai <tiwai@suse.de>
Date: Tue Jun 3 14:46:34 2008 +0200

[ALSA] hda - Fix resume of auto-config mode with Realtek codecs

The auto-config mode of Realtek ALC codecs has a bug since 2.6.25
that it cannot resume properly. The problem was the wrong assignment
of init_hook that overrides the whole initialization.

Relevant bug reports:
http://bugzilla.kernel.org/show_bug.cgi?id=10662
https://bugzilla.novell.com/show_bug.cgi?id=385473

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Please add the following comment:

The patch made it in 2.6.25.7: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.7