Did you try booting SuSE without starting X, runlevel 2/3 I think? If it runs fine in non-gui mode, then you should be able to run the SaX2 configuration utility to test X resolutions/graphical modes to figure out if the default resolution is too high like IceCold mentioned. I think "ctrl" + "alt" + num pad "+" changes the resolution to the next one in your XF86Config file, but I'm not 100% positive. I'm getting rusty with this stuff since I put SuSE on my Dell laptop. It installed so perfectly that I didn't have to screw around with things to make them work right (unusual, I know!).