I have strange problem. Alsa uses by default power save in my sound card, what causes cracking noise. I can disable it by running:

sudo sh -c "echo '0' > /sys/module/snd_hda_intel/parameters/power_save"

But after I suspend and wake up machine, it is restored to 10..
I have tried almost everything. I put this to modprobe.conf:

options snd_hda_intel power_save=0

But still 10 after suspend..
Then I tried to add command to /etc/pm/sleep.d/sleep_commands file.
(This file is created by me, it sets pidgin state after suspend and sets correct time.)

sudo sh -c "echo '0' > /sys/module/snd_hda_intel/parameters/power_save"

I checked system log, that command is executed:

Mar 11 09:28:01 BlueGene sudo: root : TTY=unknown ; PWD=/usr/lib/hal/scripts ; USER=root ; COMMAND=/bin/sh -c echo '0' > /sys/module/snd_hda_intel/parameters/power_save

But still 10..

I have no clue how to get this working..

The scripts in /etc/pm/sleep.d are run by root so you don't need the sudo. IDK if using it would prevent the command from working but you could try changing it to echo '0' > /sys/module/snd_hda_intel/parameters/power_save

Thanks for response.
Unfortunately it did not help.
But I resolved problem. I disabled power save in kernel settings and recompiled..