Comment 14 for bug 1299322

use hda-jack-sense-test to verify the existing two headphone jacks and Mic jacks are correct

the remaining unconnected nodes are the two speakers and headset mic

http://voices.canonical.com/david.henningsson/2011/11/29/turn-your-mic-jack-into-a-headphone-jack/

you need to have root priviliege to run the program

show un connected pins and advanced override