Comment 5 for bug 870360

The Jack stuff is interesting - I wonder if these two headphone jacks actually is connected to the same pin perhaps? Could you install snd-hda-tools from https://launchpad.net/~diwic/+archive/ppa/+build/2768994/+files/snd-hda-tools_0.20110516%7Eoneiric1_amd64.deb
and then run "sudo hda-jack-sense-test -a" - with different jacks plugged and unplugged (e g try both headphone jacks independently) you should be able to figure out with node number belongs to which jack.