My Dell D830 uses an Intel Graphic Card GM965. To use dualscreen, you must use the package xrandr. As a normal user you can see your current configuration with: xrandr -q When you connect a second monitor (docking station), then by default you will get both screens displaying the same. Example: jan@southfork:~$ xrandr -q Screen 0: minimum 320 x 200, current 3600 x 1200, maximum 3600 x 1200 VGA disconnected (normal left inverted right) LVDS connected 1920x1200+0+0 (normal left inverted right) 331mm x 207mm 1920x1200 60.0*+ 1280x800 60.0 1280x768 60.0 1024x768 60.0 800x600 60.3 640x480 59.9 TMDS-1 connected 1680x1050+0+0 (normal left inverted right) 434mm x 270mm 1680x1050 59.9*+ 1280x1024 75.0 59.9 1152x864 74.8 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 TV disconnected (normal left inverted right) In my example above you will see that both screens start their output