Hi Dirk,
Thanks a lot for your post. It will be indeed really helpful in our lab.
Best regards,Philippe Philippe BENAS, Ph.D.

ARN UPR 9002 CNRS
IBMC Strasbourg
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E-mails: p.be...@ibmc-cnrs.unistra.fr, philippe_be...@yahoo.fr
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      De : Dirk Kostrewa <dirk.kostr...@lrz.uni-muenchen.de>
 À : CCP4BB@JISCMAIL.AC.UK 
 Envoyé le : Mardi 8 janvier 2019 10h01
 Objet : Re: [ccp4bb] OT: Nvidia 3D vision 2 glasses with Ubuntu workstation
   
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
>> =======================================================================
>>                                David J. Schuller
>>                                modern man in a post-modern world
>>                                MacCHESS, Cornell University
>>                                schul...@cornell.edu
>>
>>
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-- 

**************************************************
Dr. Dirk Kostrewa
Gene Center Munich
Department of Biochemistry, AG Hopfner
Ludwig-Maximilians-Universität München
Feodor-Lynen-Str. 25
D-81377 Munich
Germany
Phone:  +49-89-2180-76845
Fax:    +49-89-2180-76998
E-mail: dirk.kostr...@lmu.de
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        strubio.userweb.mwn.de
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