hello everybody!!

i've got a problem:
i installed ubuntu 11.10 on my pc, but i can't set the resolution up to 1280x1024...
the maximum value i can get with the nvidia driver is 1024x768 and 768x680 without the driver

i tried to edit the file xorg.conf, and also to use the command xrandr...

what can i try now??

can you help me??