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Chapter 4 4
Advanced X.org Configuration
4.1 Multi-Screen Configuration
Some people just can??™t get enough??”at least when it applies to screen space. Many
users can productively benefit from more screen space than a single monitor can
provide.
It??™s fairly easy to configure the X.org server to support multiple screens on one display,
if you have the hardware. In fact, if you get the X server to configure itself, it
will do a reasonable job of setting up a multi-screen configuration if it detects multiple
video cards and monitors.
To configure or tune a multi-screen setup by hand, take the following steps:
1. Create two (or more) normal Screen sections and the corresponding Device and
Monitor sections in the xorg.conf file. Ensure that each screen has a unique identifier;
in the following example, I??™ve used the identifiers ScreenA, ScreenB, and
ScreenC.
2. Add both screen sections to the ServerLayout section, numbering the screens
starting at 0:
Section "ServerLayout"
Identifier "Multiscreen layout"
Screen 0 "ScreenA" 0 0
Screen 1 "ScreenB" Below "ScreenA"
Screen 2 "ScreenC" RightOf "ScreenA"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Notice that Screen0 is positioned to 0 0, but Screen1 and Screen2 are positioned relative
to Screen0.
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