ehmm check the attached image.
Well "Unsupported Standard Game Port" is probably your headphones (Assuming they were plugged in during the screenie).
The other 2... Yeah that doesn't tell me anything.
Check on AMD's site for drivers, and I can't say much for the High Definition Audio Device because that's a broad name from hell.
You could look into Realteks Audio drivers because they might be the right ones.