How to set up Dual Screens (Twin View) On Ubuntu/Linux

If you’ve always dreamed of being able to hook up your Linux box to your TV, this is the simple, straightforward guide you’ve been looking for.

Prerequisites: An Nvidia Video card with S-Video and VGA (The normal Monitor Connection) Output.

Open up your xorg.conf file:
sudo gedit /etc/X11/xorg.conf
Navigate to the video card section of the file, it should start as:
Section “Device”
Identifier “nVidia [Model Name Here]”
Driver “nvidia”
At the bottom of this section, before the “Endsection” line, add the following:
# TwinView Options:
Option “TwinView” “True”
Option “TwinViewOrientation” “Clone”
#”Clone” for two identical screens, “LeftOf” or “RightOf” for one long,
# fused screen.
Option “UseEdidFreqs” “True”
Option “MetaModes” “1280×1024,1280×1024; 1024×768,1024×768”
Option “UseDisplayDevice” “CRT, TV”
# End of TwinView Options

Restart X:
Hit “CTR+ALT+BACKSPACE” or restart your computer and you should be all set!