There seems to be some problem with SuSE 10.1 and its video components, judging from all of the posts about this kind of thing.
A lot of people have complained about problems with both ATI and Nvidia drivers. All that I can tell you is that when I first installed OpenSuSE v10.1 the screen was unbearably slow. I set the default run level to 3 so that I could log in to the computer in text console mode and play with the X software. I installed an old version of ATI drivers and the problem went away. Then I got the new drivers and my screen went black when I started X. So I went back to the old driver.
You might look at your /etc/X11/xorg.conf file. See if there is a section for the video card. The generic driver name for this is radeon. The ATI driver name is fglrx. Here is that section from my xorg.conf. You can see that I am running the fglrx driver, but remember it is the old driver. It is the 08-21-07 driver to be exact. You probably don't need all of those options. This was created by sax2.
Code:
Section "Device"
BoardName "R200 BB"
BusID "1:0:0"
Driver "fglrx"
Identifier "Device[0]"
#Option "NoDDC"
Option "UseInternalAGPGART" "no"
Option "no_accel" "no"
Option "no_dri" "no"
Option "mtrr" "off"
Option "ScreenOverlap" "0"
Option "GammaCorrectionI" "0x00000000"
Option "GammaCorrectionII" "0x00000000"
Option "Capabilities" "0x00000000"
Option "CapabilitiesEx" "0x00000000"
Option "VideoOverlay" "on"
Option "OpenGLOverlay" "off"
Option "CenterMode" "off"
Option "PseudoColorVisuals" "off"
Option "Stereo" "off"
Option "StereoSyncEnable" "1"
Option "FSAAEnable" "no"
Option "FSAAScale" "1"
Option "FSAADisableGamma" "no"
Option "FSAACustomizeMSPos" "no"
Option "FSAAMSPosX0" "0.000000"
Option "FSAAMSPosY0" "0.000000"
Option "FSAAMSPosX1" "0.000000"
Option "FSAAMSPosY1" "0.000000"
Option "FSAAMSPosX2" "0.000000"
Option "FSAAMSPosY2" "0.000000"
Option "FSAAMSPosX3" "0.000000"
Option "FSAAMSPosY3" "0.000000"
Option "FSAAMSPosX4" "0.000000"
Option "FSAAMSPosY4" "0.000000"
Option "FSAAMSPosX5" "0.000000"
Option "FSAAMSPosY5" "0.000000"
Option "UseFastTLS" "0"
Option "BlockSignalsOnLock" "on"
Option "ForceGenericCPU" "no"
Option "KernelModuleParm" "agplock=0"
VendorName "ATI"
EndSection