ahja. Some good news:

I've found out that in

Code:
 /etc/modules
always the "ymfpci" was loaded. This probably wrong. Then when doing this:

Code:
% rmmod ymfpci
% modprobe snd-ymfpci
% alsamixer
everything went fine. So my solution was: Removing the wrong entry and let the programs itself load the module when needed! So just comment out "ymfpci" and try it again.

But this brings a new problem to me: How can I store/configure the volume settings using knoppix only? The problem is:

Code:
% amixer set bla bla
won't work, since alsa-utils aren't installed. So any comments on this?