Turn your external screen into the primary one in Ubuntu

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Just enter xrandr to get hold of the display names. Then enter xrandr –output <display name> –primary i order to make your external screen the primary one. Done! See example below:

magnus@gollum:~$ xrandr
Screen 0: minimum 320 x 200, current 3600 x 1200, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
LVDS connected 1680×1050+1920+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1680×1050      60.6*+
   1400×1050      60.0 
   1280×1024      59.9 
   1440×900       59.9 
   1280×960       59.9 
   1280×854       59.9 
   1280×800       59.8 
   1280×720       59.9 
   1152×768       59.8 
   1024×768       59.9 
   800×600        59.9 
   848×480        59.7 
   720×480        59.7 
   640×480        59.4 
S-video disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1920×1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920×1200      60.0*+
   1600×1200      60.0 
   1280×1024      75.0     60.0 
   1152×864       75.0 
   1024×768       75.1     60.0 
   800×600        75.0     60.3 
   640×480        75.0     60.0 
   720×400        70.1
magnus@gollum:~$ xrandr –output DVI-0 –primary
magnus@gollum:~$

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