Try these (singly):
Code:
options snd-hda-intel model=3stack-dig
options snd-hda-intel model=laptop-dig
options snd-hda-intel model=basic
options snd-hda-intel model=touchsmart
Also if you haven't installed alsa-backports, it's worth a shot:
Code:
sudo apt-get install linux-backports-modules-alsa-lucid-generic