by Husse on Mon Oct 15, 2007 6:05 am
Open anything related to sound and look around. Surprisingly often something has been muted
Double click the volume control - open totem, mplayer, audacity and what else you may have
If that does not help you could try reinstalling alsa-base
If you use oss check that too

Don't fix it if it ain't broken, don't break it if you can't fix it