I'm using Fedora 10, and up until a day or two ago had no trouble with the sound. Now, if I try to play an mp3, totem goes for about two or three seconds and stops. The tests in Sound Preferences fail, but if I plug my speakers in half-way, I get a steady tone, no matter what's happening. I've also tried headphones, and got exactly nothing. Does anybody know how I can troubleshoot this and, if possible, restart the sound system without a restart?