If you have 2.6 and the Alsa drivers, it all works well - just make sure you edit settings with the 'alsamixer'. You'll probably find that everything is working but your headphone channel is muted. With OSS I have no idea what setting to change (or if this is even possible). It is also possible that you have the headphones plugged into the microphone socket - in which case you can actually record sound via your headphones... hahaha.