I think it is the video driver caused the problem. The Appearance Preferences->Visual Effects changed to NONE from NORMAL. When I checked NORMAL, a message box appeared, showing "searching for driver", and the screen went black again. Now I can't check NORMAL option any more.
I think it is the video driver caused the problem. The Appearance Preferences->Visual Effects changed to NONE from NORMAL. When I checked NORMAL, a message box appeared, showing "searching for driver", and the screen went black again. Now I can't check NORMAL option any more.