I have a fairly new Asus k55a laptop...I installed Ubuntu on it but need to use Windows for my work so I haven't really done a whole lot in Ubuntu since installing. For this reason, I'm not sure if the headphones were working in 12.04. I just upgraded to 12.10, and find that that my Sony headphones are not working. It recognizes that they're in and it says I have sound but I'm not hearing anything. Speakers work fine and sound is good without headphones.