This worked for me too on an AMD based Thinkpad Edge running ubuntu 10.04 x64. I didn't have a modprobe.conf and alsa-base.conf was in /etc/modprobe.d/alsa-base.conf
This worked for me too on an AMD based Thinkpad Edge running ubuntu 10.04 x64. I didn't have a modprobe.conf and alsa-base.conf was in /etc/modprobe. d/alsa- base.conf