Frist is your monitor capible of hanling the resolution you want to use? it your monitor only supports 640x480 then you can't go any higher.
During the last couple questions it asks what video settings do you want... starting at the editing of resolution and color depth. you might want to change this in your /etc/X11/XF86Config :
Code:
Section "Screen"
Identifier "Screen 1"
Device "nVidia GeForce FX 5200"
Monitor "Dell M782 Color Montior"
DefaultDepth 16
Subsection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
EndSection
To this:
Code:
Section "Screen"
Identifier "Screen 1"
Device "nVidia GeForce FX 5200"
Monitor "Dell M782 Color Montior"
DefaultDepth 16
Subsection "Display"
Depth 8
Modes "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "640x480"
ViewPort 0 0
EndSubsection
EndSection