X.Org/Dual Monitors/Intel

Intel 945: cannot set second monitor right-of or left-of
It seems the intel driver cannot handle a section larger than 2048 per 2048. This means that if you want to set a 1440x900 screen aside a 1280x800 screen, it will fail.

The workaround (proposed on ArchLinux BBS) consists in setting in the driver section and setting you second monitor below, not right-of, with: Setting VGA screen below with xrandr

For extending the screen area you can also type, Setting VGA screen on the right with xrandr Here basically, VGA1 is the extra screen connected, and LVDS1 is the parent screen.

The names of the screens may vary with computer to computer, for that just see the following code

For checking the names of all the connected screens with the computer