After a day of work in the GeoWall lab at the GIScience Center of the Zurich University, I got QGis Globe to work in QuadBuffer stereo mode with polarization glasses.
The hardware used is a Dell Precision 390 workstation with a NVIDIA Quadro® FX 3500 Graphic card and two projectors mounted on a special rack with polarizing lenses.
The software on the software side, the mutex-globe branch was installed on an Ubuntu natty, using the classic (no effects) desktop since stereo cannot be used with the X composite extension. The graphic driver is the 270.41.06 coming from the restricted driver in Ubuntu. The modification I had to do to the /etc/xorg.conf generated from nvidia-settings file where the addition of:Section "Extensions" Option "Composite" "off" EndSection
and within the Section „Device“:Option "Stereo" "4"
Here the file for reference:`# nvidia-settings: X configuration file generated by nvidia-settings
nvidia-settings: version 270.29 (buildd@roseapple) Fri Feb 25 14:43:24 UTC 2011
Section “ServerLayout”
Identifier “Layout0”
Screen 0 “Screen0” 0 0
InputDevice “Keyboard0” “CoreKeyboard”
InputDevice “Mouse0” “CorePointer”
Option “Xinerama” “0”
EndSection
Section “Files”
EndSection
Section “InputDevice”
generated from default
Identifier “Mouse0”
Driver “mouse”
Option “Protocol” “auto”
Option “Device” “/dev/psaux”
Option “Emulate3Buttons” “no”
Option “ZAxisMapping” “4 5”
EndSection
Section “InputDevice”
generated from default
Identifier “Keyboard0”
Driver “kbd”
EndSection
Section “Monitor”
HorizSync source: edid, VertRefresh source: edid
Identifier “Monitor0”
VendorName “Unknown”
ModelName “Projectiondesign AS”
HorizSync 30.0 - 140.0
VertRefresh 48.0 - 110.0
Option “DPMS”
EndSection
Section “Device”
Identifier “Device0”
Driver “nvidia”
VendorName “NVIDIA Corporation”
BoardName “Quadro FX 3500”
Option “Stereo” “4”
EndSection
Section “Screen”
Identifier “Screen0”
Device “Device0”
Monitor “Monitor0”
DefaultDepth 24
Option “TwinView” “1”
Option “TwinViewXineramaInfoOrder” “DFP-0”
Option “metamodes” “DFP-0: nvidia-auto-select +0+0, DFP-1: nvidia-auto-select +0+0”
SubSection “Display”
Depth 24
EndSubSection
EndSection
Section “Extensions”
Option “Composite” “off”
EndSection
`