Dear colleagues,
since approximately end of last year, there is indeed a 3D stereo
problem under CentOS/Scientific Linux 7.6. I found the odd reason for
this by a small warning message in the Xorg-log file and some
trial-and-error and just want to share this with you, in case, you come
across the same problem:
My xorg.conf contains the usual switch-off of the composite extension,
since this is incompatible with 3D stereo:
Section "Extensions"
Option "Composite" "Disable"
EndSection
However, in recent Xorg-log files, there is a warning that the extension
"Composite" is not recognized, but the extension "COMPOSITE" is loaded.
This doesn't lead to 3D stereo problems on the KDE desktop, but disables
3D stereo on the MATE and probably the XFCE desktop. The solution is
both odd and easy - you have to modify the composite option in your
xorg.conf as follows:
Section "Extensions"
Option "COMPOSITE" "Disable"
EndSection
I have no idea, since when Xorg is case-sensitive, or whether this has
anything to do with the Nvidia driver (I use the one from ELRepo).
Anyway, this solution appears to work.
Best wishes,
Dirk.
On 20.12.18 22:28, Kay Diederichs wrote:
Unfortunately, monitors with built-in emitter are no longer being manufactured.
The NVIDIA website has not been updated for years. So that path leads nowhere.
Stereo has worked well for us (for existing monitors with built-in emitter, and
with Quadro cards /USB emitter) until and including CentOS 7.5. Recently, this
stopped after updating to CentOS 7.6 - coot finds the stereo-capable hardware
and reports the switch to stereo, but the monitor does not flip the pictures.
We are investigating. We are using the Nvidia drivers through the EPEL
repository.
best,
Kay
On Thu, 20 Dec 2018 16:11:56 -0500, David Schuller <schul...@cornell.edu> wrote:
I can see two possible paths here:
1) Make the card work with an emitter
or 2) Switch to a monitor with a built-in emitter
Datasheet on the graphics card:
<https://www.nvidia.com/content/dam/en-zz/Solutions/design-visualization/productspage/quadro/quadro-desktop/quadro-pascal-p4000-data-sheet-us-nvidia-704358-r2-web.pdf>
"3D Stereo support with Stereo Connector1
...
1 VGA/DVI/HDMI/stereo support via adapter/connector/bracket"
The task then is to identify the correct bracket to work with this card,
and find a source for purchase.
Something like this:
https://www.bhphotovideo.com/c/product/652465-REG/PNY_Technologies_900_50762_0000_000_Stereo_Bracket_for_Quadro.html
"PNY Technoligies Stereo Bracket for Quadro FX 3800"
Is this part also compatible with the Quadro P4000? I do not know.
http://www8.hp.com/h20195/v2/GetPDF.aspx/c04658472.pdf
"NVidia 3D Stereo Bracket...
Supports NVIDIA Quadro® K4000, K5000, K6000, K4200, K5200,
M4000, M5000, M6000, P4000, P5000, P6000 graphics cards"
Seems promising.
-----
Here is a web page listing compatible monitors. You can filter for those
with "built-in emitter"
https://www.nvidia.com/object/3d-vision-displays.html
On 12/20/18 3:45 PM, Adarsh Kumar wrote:
Hello everyone
We have just purchased a Dell workstation for crystallography data analysis. We
were trying to use Nvidia 3D vision 2 glasses with it, but failed to do so.
Please help me out with this one. Some relevant information is as follows:
OS: Ubuntu 16.04 LTS
Graphics : Quadro P4000 (unfortunately doesn't have a 3-pin DIN socket)
Monitor: Asus VG248QE
Thanks and regards
Adarsh Kumar
Suo Lab
Florida State University College of Medicine
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=======================================================================
All Things Serve the Beam
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David J. Schuller
modern man in a post-modern world
MacCHESS, Cornell University
schul...@cornell.edu
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Gene Center Munich
Department of Biochemistry, AG Hopfner
Ludwig-Maximilians-Universität München
Feodor-Lynen-Str. 25
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Germany
Phone: +49-89-2180-76845
Fax: +49-89-2180-76998
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