Comment 35 for bug 1321421

@daniel, thanks for that. I think even though there are fixes, its not a simple procedure (especially for new ubuntu users) as some fixes work for some people but not others.

@dogmatic do this in terminal:
Sudo gedit /etc/modprobe.d/alsa-base.conf
And add the line:
options snd-hda-intel vid=8086 pid=8ca0 snoop=0
Save, exit, reboot.

That fixed it for me. Fixed starcraft and everything!

The reason it took me a while to update what fixes it is the sound stopped working all together. Took me a while (and a total reinstall) to realise it was the duel boot to windows (2 seperate hdds). Windows wont give anything else access to the soundcard! So for anyone with this chipset duel booting, simple solution, dont restart from windows to boot into ubuntu, shut down and power up again. If this still fails, unplug the computer (or if a laptop take the battery out) for 15sec, plug it back in AND WAIT 15SEC, then boot into ubuntu and see if it works. This is for if the sound doesn't work at all, for the skipping and scratchy sound, add the line to alsa-base.conf