to set these ->
You can direct XRandR to set a different resolution like this:
xrandr --output LVDS --mode 1024x768
xrandr --output VGA1 --mode 1024x768
The refresh rate may also be changed, either at the same time or independently:
xrandr --output LVDS --mode 1024x768 --rate 75
xrandr --output VGA1 --mode 1024x768 --rate 60
the above is for the default X driver
the full list of things you can do is here.
heres the howto for propriarity drivers.
https://help.ubuntu.com/community/Binar ... wto/Nvidia
this one was wrong for my version "Launch the Startup Manager from System -> Administration -> Startup-Manager." i had to do gksudo startupmanager from the terminal to open it but after it worked like a charm.
when done reboot the system (not exactly nessesary but if you did something wrong in the bootup you will notice).
and thats it