Xorg.conf - ASUS F5GL + vesa with 1280x800

Section "InputDevice"
    Identifier  "Keyboard0"
    Driver      "kbd"
EndSection

Section "InputDevice"
    Identifier  "Mouse0"
    Driver      "mouse"
    Option      "Protocol" "auto"
    Option      "Device" "/dev/input/mice"
    Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
    Identifier   "Monitor0"
    VendorName   "Monitor Vendor"
    ModelName    "Monitor Model"
    # Xorg.0.log
    # [ 10170.045] (II) VESA(0): Monitor0: Using hsync range of 31.50-48.00 kHz
    # [ 10170.045] (II) VESA(0): Monitor0: Using vrefresh range of 50.00-70.00 Hz
    HorizSync    31.50-48.00
    VertRefresh  50.00-70.00
    # cvt 1280 800 60
    Modeline "1280x800_60.00"   83.50  1280 1352 1480 1680  800 803 809 831 -hsync +vsync
EndSection

Section "Device"
    Identifier  "Card0"
    BusID       "PCI:2:0:0"
    Driver      "vesa"
    # Driver      "modesetting"
    # Driver      "nvidia"
    # Driver      "nouveau"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "Card0"
    Monitor    "Monitor0"
    SubSection "Display"
        Depth     24
    EndSubSection
EndSection

Section "ServerLayout"
    Identifier     "X.org Configured"
    Screen      0  "Screen0" 0 0
    InputDevice    "Mouse0" "CorePointer"
    InputDevice    "Keyboard0" "CoreKeyboard"
EndSection