Ubuntu 12.04.1 On Dell Inspiron 17. In Windows the headphone jack works fine. Installed 12.04 the first time and the headphone jack worked fine then as well. Ran into some issues so had to do a clean reinstall of 12.04. Now the headphones will not put sound through when the plug is all the way into the jack. If I pull it out partially I get sound but I have to get it just right so the sound is cut from the speakers, otherwise the sound goes back and forth between the headphones and the internal speakers when the cord is jiggled.