cambiar resolucion en monitor 17" en linux

[TheGhost]

oK hice exactamente eso y nada...asi lo tengo ahora

Section "Screen"

# If your card can handle it, a higher default color depth (like 24 or 32)
# is highly recommended.
# DefaultDepth 8
# DefaultDepth 16
# DefaultDepth 32
# "1024x768" is also a conservative usable default resolution. If you
# have a better monitor, feel free to try resolutions such as
# "1152x864", "1280x1024", "1600x1200", and "1800x1400" (or whatever your
# card/monitor can produce)
Identifier "Screen 1"
Device "VESA Framebuffer"
Monitor "My Monitor"
DefaultDepth 24
Option "RenderAccel" "true"
Option "AllowGLXWithComposite" "true"
SubSection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection


Lo modifique y reinicie las X's pero nada, sigo sin tener la opción de la nueva resolución. Incluso inicie el sistema....

Saludos
The Ghost

PD: no se porque me late que ese Vesa Framebuffer tendría que cmabiarlo al de mi driver Nvidia?