[Bug 28443] Re: no sound Intel HDA (ICH6) and ALC260 (or ALC880) mixer; no errors

[LarsBjerregaard]

Sound worked for me in Breezy, but in a completely new install of Dapper - no sound at all. I see many people all over the place struggling with this. After _many_ hours of googling, I found a simple workaround which works for me. It was described on:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2038

So basically what I did (as root):
1) Backup /etc/modprobe.d/alsa-base
2) Add to the bottom of /etc/modprobe.d/alsa-base:
options snd-hda-intel model=ref
3) Reboot

Voila! Sound works.

My system:

cat /proc/asound/version gives:
Advanced Linux Sound Architecture Driver Version 1.0.10rc3 (Mon Nov 07 13:30:21 2005 UTC).

lspci -vv | fgrep Audio gives:
0000:00:1b.0 0403: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)

cat /proc/asound/card0/codec#0 gives:
Codec: SigmaTel STAC9221 A1

The problem seems to be Alsa headaches with STAC9221, but seems like
they are fixing it in source upstream.

-- 
no sound Intel HDA (ICH6) and ALC260 (or ALC880) mixer; no errors
https://launchpad.net/bugs/28443