There was something call Xdmx a while back (
http://dmx.sourceforge.net/) but
it seems as though that code has been merged into X.org.
Try looking at
http://en.wikipedia.org/wiki/Xinerama and
http://en.wikipedia.org/wiki/XRandR as I believe that Xinerama is in there
now but X.org will be moving to XRandR soon.
Stu
2009/8/20 James Ashburner <hantslug@???>
> Hi All,
>
> I'm sure I've seen some software that allowed you to use a laptop as an
> additional screen, booting as a live CD if I remember correctly. Anyone
> have a clue what I'm talking about? :)
>
> James
>
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