The menus in Mario Kart Wii run perfectly at 60 fps but whenever I get into main menu after you select Single Player the FPS goes down to about 40 and the audio is all messed up then down to about 20-30 when actually on the track driving. I don't know if it's an issue with my hardware or Ubuntu but it is kind of annoying. Same thing happens in Super Smash Bros Brawl menus at 60 fps when I do Solo Classic mode and fps goes down to about 30 fps.

