Comment 65 for bug 465942

Installed the kernel update from lucid-proposed, and commented out the line
options snd-hda-intel position_fix=1
in /etc/modprobe.d/alsa-base.conf

Then rebooted.

The hardware disappeared the first time I tried adjusting microphone levels.

After doing "alsa force-reload" I tried again. Several times the driver entry in the list flickered/"jumped" and reset the sound levels back to where they were. (Not much good if I were doing serious sound work.) Eventually, the driver entry disappeared altogether.

Reloaded again. The same behaviour persists, though I haven't managed to make the driver disappear this time. It looks from the behaviour of the indicator app in the panel that the driver is intermittently unloading for about a second before reloading again.

For the moment, I'm going to revert to the previous kernel version and alsa-base.conf settings.