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Stereo: Difference between revisions
→Linux
(→Nvidia 3D Vision 2: added some information on sourcing a 3-pin mini-DIN cable for connecting the quadros, since they are practically impossible to find premade.) |
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[[Zalman Stereo]] is supported by [[Coot]]; no drivers or other software must be installed. | [[Zalman Stereo]] is supported by [[Coot]]; no drivers or other software must be installed. | ||
NVidia 3D Vision and 3D Vision 2: Requires the appropriate hardware as detailed above. With the NVidia proprietary graphics drivers installed, 3D Vision will work with a few minor tweaks. The Xorg configuration file | NVidia 3D Vision and 3D Vision 2: Requires the appropriate hardware as detailed above. With the NVidia proprietary graphics drivers installed, 3D Vision will work with a few minor tweaks. The Xorg configuration file (usually located at /etc/X11/xorg.conf) must be adapted. | ||
# It can be edited -- see [http://us.download.nvidia.com/XFree86/Linux-x86_64/346.35/README/xconfigoptions.html] for more information), or | |||
# <code>nvidia-settings</code> could be run, or | |||
# <code>nvidia-xconfig --stereo=10</code> (The value of 10 is specific to the 3D Vision system) | |||
The | The resulting xorg.conf has an option for stereo mode under the section labeled "Device" in this minimal example: | ||
<pre> | |||
Section "Device" | |||
Identifier "Device0" | |||
Driver "nvidia" | |||
VendorName "NVIDIA Corporation" | |||
Option "Stereo" "10" | |||
EndSection | |||
</pre> | |||
The following is a longer example, for a dual-monitor setup - this was generated with <code>nvidia-settings</code> and has the stereo option in the "Screen" section:: | |||
<pre> | |||
Section "Monitor" | |||
Identifier "Monitor0" | |||
VendorName "Unknown" | |||
ModelName "BenQ XL2420TX" | |||
HorizSync 30.0 - 140.0 | |||
VertRefresh 56.0 - 120.0 | |||
EndSection | |||
Section "Device" | |||
Identifier "Videocard0" | |||
Driver "nvidia" | |||
EndSection | |||
Section "Device" | |||
Identifier "Device0" | |||
Driver "nvidia" | |||
VendorName "NVIDIA Corporation" | |||
BoardName "Quadro K420" | |||
EndSection | |||
Section "Screen" | |||
Identifier "Default Screen" | |||
Device "Videocard0" | |||
EndSection | |||
Section "Screen" | |||
Identifier "Screen0" | |||
Device "Device0" | |||
Monitor "Monitor0" | |||
DefaultDepth 24 | |||
Option "Stereo" "10" | |||
Option "nvidiaXineramaInfoOrder" "DFP-0" | |||
Option "metamodes" "DVI-I-1: 1920x1080_120 +0+0, DP-1: nvidia-auto-select | |||
+1920+0" | |||
Option "SLI" "Off" | |||
Option "MultiGPU" "Off" | |||
Option "BaseMosaic" "off" | |||
SubSection "Display" | |||
Depth 24 | |||
EndSubSection | |||
EndSection | |||
</pre> | |||
This should be enough to get stereo working. However, note that there is a major issue on linux with window compositing causing stereo images to display improperly. This is a problem with the window display manager, and is not inherent to Xorg or NVidia. If you try to turn on stereo in Coot in a display manager that makes use of the Xorg compositing extension (e.g., Gnome3, or Unity in Ubuntu) then what you will see when you activate hardware stereo is a slight rotation of the view, but stereo remains disabled. In order to get around this problem, you must use a display manager that does not make use of compositing as part of its eye candy. This author has found the MATE desktop to work quite well for this purpose (and may in fact be one of the few that still does not use software compositing by default). Note that you ''do not'' need to disable the Compositing extension in the Xorg configuration file to make this work -- this will allow you to switch back to Gnome3, Unity, etc when you don't need stereo if you prefer! Not disabling the window compositing extension globally allows for a more flexible setup depending on your preferred workflow. | This should be enough to get stereo working. However, note that there is a major issue on linux with window compositing causing stereo images to display improperly. This is a problem with the window display manager, and is not inherent to Xorg or NVidia. If you try to turn on stereo in Coot in a display manager that makes use of the Xorg compositing extension (e.g., Gnome3, or Unity in Ubuntu) then what you will see when you activate hardware stereo is a slight rotation of the view, but stereo remains disabled. In order to get around this problem, you must use a display manager that does not make use of compositing as part of its eye candy. This author has found the MATE desktop to work quite well for this purpose (and may in fact be one of the few that still does not use software compositing by default). Note that you ''do not'' need to disable the Compositing extension in the Xorg configuration file to make this work -- this will allow you to switch back to Gnome3, Unity, etc when you don't need stereo if you prefer! Not disabling the window compositing extension globally allows for a more flexible setup depending on your preferred workflow. | ||