I am using MSI VR440 laptop http://www.msi.com/product/nb/VR440....=Specification . The laptop uses SIS Graphics card and has the resolution of 1280x800.

When I connect a desktop LCD monitor Samsung with the resolution of 1366x768, the desktop monitor displays the same resolution as that of the laptop, showing the copy of the laptop's monitor and making it distorted. There is no extending of the monitor.

How should I extend my display the external monitor ?

I am currently using display drivers from http://ajoliveira.com/ajoliveira/uk/software/xorg.php which runs fine.