Comment 21 for bug 556663

Still no luck on Ubuntu 11.04 or 11.10.
model=test doesn't work on my B1904TU but model=will does on Ear port, sound quality is not very good if only model=will.

After using below, sound quality is good (haven't try which one makes). Try to check alsa-source if possible.
alias snd-card-0 snd-hda-intel
alias snd-slot-0 snd-hda-intel
options snd-hda-intel model=will
options snd-hda-intel enable_msi=1