I just installed Mplayer, to play some Divx files, and realized I don't have any sound in Linux!
I'm using the built-in soundcard from my ASUS A7V8X-X Motherboard. The audio devices control panel has this:
Vendor: VIA Technologies
Model: VT8233 AC97 Audio Controller
Module: via82cxxx_audio
Clicking, "Play test sound" obviously plays nothing,

. The light on the speaker doesn't even go on.
I'm using a pair of pretty simple, pretty old, but still pretty nice Altec Lansing speakers.