I recently defenestrated this laptop and I'm having some issues with the graphics.

I'm seeing some pretty nasty screen tearing on this thing. I didn't notice any while the machine had windows 8 (a brief amount of time, admittedly) which leads me to suspect some kind of driver issue.

Googling led me to some tearing issues from ATI drivers and the new version of X but since most posts are a bit dated I don't know if that is what is happening to me.

The machine is a g6-2211nr model with an AMD A4-4300 APU and it's running 12.10.

The computer details dialog is showing "Driver: Unknown", this makes me wonder if the graphics adapter is even detected at all. I would like to try the open source drivers first if possible, but I dont know if they're being used or not right now.

Any ideas?