how do I change screen resolution?

[ndori]

i have a toshiba 660CDT and i tried to change the resolution using
knoppix screen=800x600 but it wont work.
the problem is that i can't see the whole screen so i can't even use the expert startup.
what can i do????

[MorskNorsk]

Would one of the framebuffer options or a VGA option work? Look here for all the cheatcodes.