I see from your alsa-info script run that you are using a custom kernel.
Could you please try the latest prebuilt kernel from the Ubuntu karmic
repo and let me know if the problem still persisits?
affects ubuntu/alsa-driver
status incomplete
** Changed in: alsa-driver (Ubuntu)
Status:
Public bug reported:
Binary package hint: udev
Description:Ubuntu karmic (development branch)
Release:9.10
libudev0 1:143-8
udev 143-8
As described in bugreport 393591 after upgrading some devices are not
created properly. If I am not misguided bug 393591 is fixed in 143-8, so
I
