Vše je potřeba upravit v /etc/X11/xorg.cof - otevři ho pomocí příkazu gksudo gedit /etc/X11/xorg.conf, pokud nemáš v Xubuntu nainstalovaný Gedit, tak ho doinstaluj příkazem sudo apt-get install gedit
Na jednom PC mám stejnou GK, a pomohlo doplnit toto:
do Section "Screen"
Modes "1152x864" - tady si zadej rozlišení, který požaduješ!!!
do Section "Device"
Option "DynamicTwinView" "False"
pro jistotu přikládám celý můj xorg.conf:
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildd@ninsei) Fri Sep 5 22:23:08 UTC 2008
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
Option "XkbLayout" "cz,us"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30.0 - 110.0
VertRefresh 50.0 - 150.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
Option "DynamicTwinView" "False"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1152x864"
EndSubSection
EndSection