Comment 40 for bug 607482

Resolved now. Thanks to all those that helped along the way. The final fix was spelled out here:

https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules

On irc in the channel #alsa dtchen mentioned that the VIA codecs have been significantly recently.

Fixed in these packages:

ii alsa-base 1.0.24+dfsg-0ubuntu1 ALSA driver configuration files
ii alsa-utils 1.0.24.2-0ubuntu6 Utilities for configuring and using ALSA
ii bluez-alsa 4.91-0ubuntu1 Bluetooth ALSA support
ii gnome-alsamixer 0.9.7~cvs.20060916.ds.1-2 ALSA sound mixer for GNOME
ii gstreamer0.10-alsa 0.10.32-1ubuntu5 GStreamer plugin for ALSA
ii linux-alsa-driver-modules-2.6.38-10-generic 2.6.38-10.201107131605 Ubuntu-supplied Linux modules for version 2.6.38-10-generic ALSA snapshots