It's a shame you installed 1.0.21, because I would have recommended you try installing linux-backports-modules-alsa-karmic-generic, which is newer than 1.0.21 (it's a snapshot of alsa-driver stable from 20091012).
It's a shame you installed 1.0.21, because I would have recommended -modules- alsa-karmic- generic, which
you try installing linux-backports
is newer than 1.0.21 (it's a snapshot of alsa-driver stable from
20091012).