I have a Radeon HD 5800 (not sure how to find out which) and I have the proprietary driver installed. I can watch movies, etc, and play some games, but I don't think the 3D part is working properly? I want to play Guild Wars and I've installed it ok, but it doesn't display the log on screen, only the graphics behind it. Wine site says it's platinum and should run fine and to check other games.
Supertuxkart also uses 3D and Wine suggested I test that before "blaming" it, and sure enough it doesn't work. So I'm stumped - I'm not after help running the games so much as how can I make sure my graphics card works properly?