Originally Posted by aus9
sounds like (no pun intended) the mixer headphone volume is either mute or turned down.
if you have kde try kmix to kmix can not mute headphones but OUTPUT tab has volume slider.
if you have gnome can not help with a gnome specific, but you can open a shell and run with root powers
alsamixer if you are using alsa.
I have checked the volume .. its ok..
and yes I am using Genome..ALSAMIXER..checked all the settings..everything seems to be ok..