Comment 9 for bug 546769

Oh, FWIW, I also had a volume of 0 on Speaker in alsamixer that I had to set to max. Everything looked fine in the sound preferences, so presumably once again there's some confusion on what channel things are playing on :)

Anyway, his solution is still working although making it permanent would be nice. Mildly annoying to fire up HDA Analyser, esp since it freaks out with some network error on startup if I'm not on a network.