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.

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https://bugs.launchpad.net/bugs/870360

Title:
  [HP Pavilion dv7 Notebook PC, IDT 92HD75B3X5, Internal] Speakers not
  disabled when headphone jack plugged in

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