Once, when I’ve had to solve the conflict between the packages, I noticed, that when Kernel-default update selected, Yast offered the option, to uninstall the ALSA-driver-kmp-default module. Ofcourse I didn’t wanted to uninstall alsa. After yast finished, I forgot to lock the kernel update, to be updated, and started the updater tool. It uninstalled the alsa driver with no problem.
After that, no more sound. 
Previously I (or the installer) installed the pae kernel, and so used that kernel, since the pae version of the driver installed as well. But the same thing came. (with alsa-driver-kmp-pae) :mad:
I previously removed the Sound Blaster (Audigy2 ZS Notebook) on the go, and while I wrote this post, I heard a ‘pot’ sound and checked, that the PulseAudio is ‘connected’, working. 
Now I realy don’t understand what happening on my linux!
I’m using openSUSE 11, I have the above mentioned Sound Blaster Aundigy2 ZS Notebook, and a built in Realtek sound card. The notebook is a Fujitsu Siemens computers Amilo Pro v3525.