How to connect system to LCD projector

System Specifications
Operating system : Ubuntu (Linux)
Graphics card : Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller

Steps for Setting up the system 
Edit the xorg.conf file

Location of the xorg.conf file is /etc/X11/xorg.conf

Open the file and edit the section device like this :

Section "Device"
Identifier "Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller"
Driver "intel"
BusID "PCI:0:2:0"
Option "MonitorLayout" "NONE,LFP+CRT"
Option "DevicePresence" "true"
Option "CheckLid" "false"
EndSection

Installing tool

Now you need to install a tool to switch your display between the LCD display and your monitor.

sudo aptitude install i810switch

will install two tools called i810switch and i810rotate.

i810switch: Two commands can be used to switch your display. crt is the display on projector. so,

i810switch crt on

will switch to crt. Then,

i810switch crt off

will switch off the display on projector screen.

One more tool can be used,

i810rotate

which will switch on and switch off the display.