Comment 122 for bug 411574

I can confirm that I have the same problem with the below card on karmic 64bit with all latest updates applied as at time of this writing. No matter what I put into my /etc/modprobe.d/alsa-base.conf the only thing that really works is a "sudo alsa force-reload" (sound/pcm levels aren't the culprit either).

$ lspci -v |grep Audio
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)

$ cat /proc/asound/card0/codec#* |grep Codec
Codec: Analog Devices AD1986A
Codec: LSI Si3054