umm, i have the opposite problem, right now i have my headphones plugged in and onboard speakers will are producing sound as if they weren't plugged in, and the headphones also produce sound normally
XXXXXXXXXXX....... same here, KraZy_Russian. The quality here is called "jack sense" - the speakers should mute when phone jack is plugged. Mine is an Acer 5253 running Ubuntu 11.04 (Linux).
Have you gotten any help on this....? I have not.
Regards, MH via tomshardware, 21NOV11.