Running a dual-boot with Vista and Ubuntu...

Vista froze on me and I had to reboot. After booting back into Ubuntu I had no sound except a crackling.

But it didnt seem to be a hardware thing because booting back into Vista, audio worked fine.

Turns out this thread had the answer.

Somehow my PCM mixer got muted...all that was needed was to bring it back up with alsamixer -Dhw