Comment 16 for bug 920899

On Panda, it is not a 4-pole headset jack, just three pole for line out / stereo headphone (in fact there are no mic arrangements at all, the upper socket is for line-in with no bias).

If you're using a 4-pole jack it may not be providing signal to the headphone part properly.

Another way to confirm it, is there any Panda hardware pack, no matter how old, that makes sound come on your headset?