HP xw3400 User Manual page 149

instead is an offset in the overall virtual screen space (1088+892+1088 by 1024), so it is just (1280-
192), or the width of the first projector minus the desired overlap. Here is the example.
# Overlap region is 1280-192=1088
Option "MetaModes"
That is how you specify overlap within a Twinview screen. The third projector is actually on a
different graphics card and thus must be specified in the Screen line in the layout section of the config
file. So, go to the first ServerLayout section named "MyLayout" and look at the offsets at the end of
the Screen 0 and Screen 1 lines. The first screen is the Twinview screen and has an offset of "0 0"
because there is no blending on the left side of the left projector. The offset of the third projector is
just the width of the first 2 projectors minus the 2 blend regions (1280+1280-192-192 = 2176). To
enable windows spanning 2 graphics cards, don't forget to turn Xinerama on.
Section "ServerLayout"
Identifier "MyLayout"
Option "Xinerama"
Screen 0 "Screen TwinView-1"
# Overlap for 3rd projector 1280+1280-192-192=2176
Screen 1 "Screen Display-2a"
EndSection
The sample config file is setup to enable Stereo. If this is not desired, just comment out all instances of
the Stereo option as below.
# Option "Stereo" "3"
The stereo emitter signal will not turn on until a stereo window is created. Stereo on the second
graphics card (third display) does not work properly until you get NVIDIA's rel80 drivers (>8000).
Once you have a rel80 driver from NVIDIA, you will also be able to turn on the stereo emitter
whenever the Xserver starts up (not just when there is a stereo window on the screen). See below.
Option "ForceStereoFlipping" "1"
Once all the xorg.conf file changes have been made, the Xserver needs to be restarted to take effect.
Then to synchronize the 2 graphics cards for stereo, you must then run the NVIDIA tool, nvidia-settings
and enable the frame lock with the primary display being the framelock server and the other 2
displays should be setup as framelock clients. This setup is specified in the nvidia-settings menu
below:
"1280x1024_96 +0+0, 1280x1024_96 +1088+0"
"on"
0 0
2176 0
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