Comment 17 for bug 542550

I've changed the model over as instructed, but still can't get sound from the internal speaker. Line out works fine. Microphone does not.

I added this

to the bottom of

sudo pico /etc/modprobe.d/alsa-base.conf

# commented out this line options snd-hda-intel model=mbp3
#added this
options snd-hda-intel model=mb31
#finished add

Whole file is attached