Try adding the following:
SubSection "Display"
Depth 24
Modes "1600x1200" "1280x1024" "1024x768" "800x600"
"640x480"
# ADD A VIRTUAL LINE TO PROVIDE FOR THE LARGEST SCREENS YOU WILL
HOTPLUG
Virtual 2048 2048
EndSubSection
As seen in http://www.thinkwiki.org/wiki/Xorg_RandR_1.2
You should then be able to
xrandr --output VGA-0 --mode "1024x768"
xrandr --output LVDS --left-of VGA-0
The first line should give cloned view for both
The second should give you dual head (should you desire that)
Turn the external display off with:
xrandr --output VGA-0 --off
I hope I got that all right as I'm not currently on my laptop. Give it
a try and see if it works for you.
--
open source ati driver in hardy can't do external monitor on laptop
https://bugs.launchpad.net/bugs/222905
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