I'm running xubuntu 8.10 (though I suspect the problem is common to all 8.10 ubuntu versions).
I can run X fairly reliably though I do have some issues when logging in and out presumably due to switching resolutions.
However switching to a console using CTRL/ALT/F1 (or any of the others) doesn't work. I just get an error message from my monitor saying the resolution is invalid. My monitor is a Dell 2001FP capable of up to 1600x1200 so I suspect that the CTRL/ALT/F1 is switching to a totally impossible resolution.
How can I fix this problem? Is there any way to specify the mode and resolution to use for the text mode consoles?