[Gllug] External display on Laptop.

[Walter Stanish]

>
> I am trying to get output on an external display such as a TV with a
> VGA input or a overhead projector.
> If I am already in X, it will not detect the new display connected no
> matter what I try and do in the ubuntu gnome display config screens.
> If I instead power off the laptop, and boot up with the display
> plugged in, it does detect the display and then the ubuntu gnome
> display config screens work as expected.
>

Use the 'xrandr' command to enable and also orient the additional display.

Example from my laptop:

$ xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 4096 x 4096
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1680x1050+0+0 (normal left inverted right x axis y axis) 0mm
x 0mm
   1680x1050      60.0*+
   1400x1050      74.8     60.0
   1280x1024      85.0     75.0     60.0
   1280x960       85.0     60.0
   1152x864       75.0
   1024x768       85.0     75.0     70.1     60.0
   832x624        74.6
   800x600        85.1     72.2     75.0     60.3     56.2
   640x480        85.0     72.8     75.0     59.9
   720x400        85.0
   640x400        85.1
   640x350        85.1

This shows two displays, external VGA (disconnected) and LVDS (laptop
screen).

If I plugged in VGA, then I could enable it with:

xrandr --output VGA --right-of LVDS

Hope that helps.

- Walter
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