Comment 91 for bug 393523

I've found a better solution for this problem.
Have a look at this site: http://wiki.ubuntuusers.de/Baustelle/Asus_X5DIJ
(The article above will propably updated 01.08.2009)
This site is in german only!

Have a look under "Problemlösungen" (Problemsolutions).
And then under "Sound".

A copy of the contents of this specific point (made 30.07.2009):
--- cut ---
sudo -s
wget ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-unstable-snapshot.tar.gz
tar xf alsa-driver-unstable-snapshot.tar.gz
cd alsa-driver-unstable
./configure --with-cards=hda-intel
make
make install
reboot
--- cut ---

!! This fix the problem with the sound ... AND the sound is still there after hibernation or standby !!

You don't need hda-verb anymore!

Hope that helps much more people.