Thanks for the reply, Dai. I'm afraid it isn't that easy, though
I was trying to use 1024x768 before because I was using an LCD display with a maximum resolution of 1024x768. I'm using a regular CRT monitor now and trying to go to 1280x1024. The problem is the same: when I startx I only get a resolution of 800x600.
I should have also mentioned before that I don't have any trouble lowering the resolution to 640x480. That works fine; it's just the high resolutions that don't work.
Here's the tail of my XF86config file. I can post the whole thing if you think it will help.....
Section "Device"
Identifier "NVIDIA GeForce 4 (generic)"
Driver "nvidia"
VendorName "Videocard vendor"
BoardName "NVIDIA GeForce 4 (generic)"
EndSection
Section "Screen"
Identifier "Screen0"
Device "NVIDIA GeForce 4 (generic)"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024"
EndSubSection
EndSection
Section "DRI"
Group 0
Mode 0666
EndSection