shutting down at failsafe login

Hi All, I enabled my Nvidia 3D. It was pretty cool. I was playing Tux Racer and the keys actually responded. Anyway, I went back into TaST to center the screen but when I clicked on the icon for Graphics Cards or Monitors under the Hardware section, the screen went blank. I finally just shut the computer off. As I suspected, it wouldn't boot. So I went into failsafe mode. At the login prompt, I logged in as me. then startx and went into YaST to fix it (don't think it did anything though). Anyway, logged out of KDE and back to the login screen. Now how do I shut down? Exit logs me out, halt does nothing, I'm stuck. Can anyone recommend a good SuSE 9.0 book I can buy? Thanks Russ