I just installed my graphics driver, but when I try to run games such as armagetron from the CLI, it will not load anything for the graphics driver. If I open a terminal from KDE and try to run it, I get "Fatal signal: Segmentation Fault (SDL Parachute Deployed)". I get the same error with a few other games installed as well (OilWar, Tuxracer, XBlast). Is there some setting that I am missing?