This is the problem.
From USB worked perfectly, but after I installed it I have a very low resolution.
I have no idea why, especially since it works from USB.
I have a nvidia card, not sure what model exactly.
I deleted bt4, and backtrack5 is unusable right now.
Anyone knows how to get a normal screen?
Ctrl+alt+keypad +/- does work, giving me an even smaller resolution (600 I think).
What can I do?