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Date: Thu, 12 Jun 2008 09:35:57 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: John Wynstra <jwynstra@nyc.rr.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: two monitors, two displays, one PC
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> In the last 4 months I bought a new monitor to replace the one that clunked 
> out in me.  I am currently using it with an old PS2 type keyboard and mouse 
> attached to a creaky old desktop that will eventually be replaced.  Likely I 
> will want to replace it with a laptop with wifi and a lot more memory and 
> hard drive so that I can take it with me.  Can I still use the old monitor as 
> a second display?
>
> Can this be done?  Is it done?  What are the issues?
>
Xorg support 2 monitors.
be default you will simply get two X displays (:0.0 and :0.1), first 
default, and use second by
DISPLAY=:0.1 program

or you may use Xinerama in X11 that creates one virtual display from two.

if you have 2 monitors, two keyboards and two mice, you may use it as 
2-use system with patched X11, i made a patch but a long time ago, it will 
not work ouf of the box with new Xorg