hi, i'm having a problem with nvidia-settings is that my resolution is not listed in. the only resolutions available are 640x480 and 320x240, the "detect display" doesn't work either.
by the way i'm using the driver from nvidia site.
other point is that i couldn't change resolution on kde before i installed the nvidia driver, it just showed the same two resolutions, i thought it was because i hadn't install the nvidia drivers but i got the same problem.

if resolution is not listed in xrandr you can try adding it.

You can check /var/log/Xorg.0.log for resolutions that were recognized as options for your monitor. If it's not listed there, then you might have greater issues.

well if somebody is having the same problem this might help you, at least this is how i fixed it, for some weird reason you have to comment this lines on the xorg.conf file:
HorizSync
VertRefresh

i don't know exactly what those lines do so if anyone knows please tell me so i can figure out what the problem actually was.

They set (or restrict) the refresh rates attempted in relation to your monitor. Mostly needed in days of old when using the wrong settings would destroy your monitor. Most current monitors will protect themselves and just show you a blank screen. There should be some EDID information that X can interpret to determine your settings for your monitor and set those values for you. Some of which is echoed in /var/log/Xorg.0.log. Although sometimes EDID information on the hardware (monitor) is WRONG. Or you have some other reason to manually set your refresh rate. Like to 60Hz if you're using a video camera to record and your monitor is in the shot. (50Hz in other nations)

$ xvidtune -show

Should show what your current settings are in a modeline type of way. A bit old school, but useful information.