I'm guessing that when you press alt-F2 the display changes to the terminal console? If yes, then that's as many colours as you can get as far as I know. The terminal console supports only 16 colour mode.
Well, you can try playing around with the framebuffer, but I never really understood how to get it to work in the terminal, so I gave up after a while and can't give you any advice on that.
Comment