Xorg.conf

Section "Device"

   Identifier     "Device0"
   Driver         "nvidia"
   VendorName     "NVIDIA Corporation"
   BoardName      "Quadro 2000M"
   Option         "RenderAccel"       "true"
   Option         "AddARGBGLXVisuals" "true"
   Option         "HWCursor"          "yes"
   Option         "CursorShadow"      "yes"
   Option         "RegistryDwords"    "EnableBrightnessControl=1"

EndSection

The Option "RegistryDwords" "EnableBrightnessControl=1" line allows you to change the brightness of the notebook's LCD via the Fn-HOME and Fn-END key combinations.

Section "Screen"

   Identifier     "Screen0"
   Device         "Device0"
   Monitor        "Monitor0"
   DefaultDepth    24
   Option         "TwinView"                  "1"
   Option         "DynamicTwinView"           "True"
   Option         "TwinViewXineramaInfoOrder" "DFP-1"
   Option         "MetaModes" "DFP-1: 1920x1200_60 +0+0, DFP-0: NULL, CRT: NULL; DFP-0: 1920x1080_60 +0+0, DFP-1: NULL, CRT: NULL;"
   SubSection     "Display"
       Depth       24
   EndSubSection

EndSection

Here I set up the 2 MetaModes:

• notebook LCD off, external LCD on, VGA off
• notebook LCD on, external LCD off, VGA off

By setting CRT-0: NULL, you can save some battery by turning off the VGA port.