Here's a line from the dmesg output I think is relevant:
[ 16.720000] hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
[ 17.348000] lp: driver loaded but no devices found
And from lspci:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
There's another solution I spotted at: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/39770
Steven Harms wrote on 2007-11-13: (permalink)
Same problem on gutsy with Dell D630. Supposed resolution currently is:
sudo apt-get install module-assistant
sudo m-a update
sudo m-a prepare
sudo m-a a-i alsa
I am giving the above a shot, and will post results. Wish me luck!