Hey guys,
after 3-4 moths without music, after searching so many weg pages and forums, after hours and hours of trials and errors (more errors than trials), I just fixed my alsa!
The problem was nothing what was described here.
Whatever I did, even
echo "jjj" > /dev/dsp stopped - no chance!
dmesg told me "cannot submit datapipe for urb 0, err = -38". After searching some time, I found out that usb-audio can't handle USB hubs.
The only thing I had to do: Unplug my audio card from the usb hub and plug it directly into the computer's usb socket. That's all.
The weird thing is that there is a bug about this from january 2004, and it's still there (kernel 2.6.13-r2 with drivers as modules).
Now I'm happy, after trying since about april this year!
-Kuli