Reset XWindows Color Depth
I am very new to Ubuntu. I have a little experience with other Linux flavors, but still very much a beginner.
I am running Ubuntu in a Microsoft Virtual PC. Whenever I have tried to run any other Linux distributions in Virtual PC, I had problems if the XWindows color depth is set higher than 16-bit (corrupted displays).
When I installed Ubuntu, it asked me to set allowed screen resolutons, but not color depth, and consequently, when it now boots, the screen comes up corrupted (actually, the window expands out like it was going to go to 800 X 600 but it is totally black).
I can boot to a command prompt, so if somebody would please tell me how to reconfigure the color depth, I should be able to get it going.
Thanks in advance for any assistance!