> Section "Screen" > Identifier "Screen0" > Device "Videocard0" > Monitor "Monitor0" > DefaultDepth 24 > SubSection "Display" > Viewport 0 0 > Depth 24 > EndSubSection > EndSection > In the Screen section try adding these options: Option "AddARGBGLXVisuals" "True" Option "DisableGLXRootClipping" "True" This did the trick for me with NVidia's 1.0-9625 driver.