Thanks for this, looking at the options it looks like for stereo we are
indeed stuck with the Quadro cards. All stereo options I've tried seem
to get disabled on the M2090 and I don't have a Grid card to try and
it's not exactly cheap so I'm not going to pop down to PC world and pick
one up on the off chance it works.
Antony
On 04/03/2015 18:33, DRC wrote:
> I personally use a Quadro FX 5000, so my experience with headless
> configurations is limited. What I will say, however, is that there
> shouldn't be any reason why nVidia couldn't provide stereo Pbuffer
> support in a headless configuration, since VirtualGL doesn't actually
> need stereo display on the server-- it just needs a quad-buffered
> Pbuffer. Now whether or not nVidia's drivers actually allow that is a
> different story. If they don't, then that's an arbitrary decision on
> their part that isn't based on any specific technical requirement.
>
> The only thing I could suggest would be to fool with various settings
> for 'Option "Stereo"' in the xorg.conf file. The default option
> ("onboard stereo") is going to check for hardware stereo support (i.e.
> the stereo DIN connector) on your graphics card, but I think you should
> be able to set it to one of the passive stereo options to get around
> that (see /usr/share/doc/NVIDIA_GLX-1.0/README.txt under Appendix B.)
> For instance, my xorg.conf has 'Option "Stereo" "8"'.
>
> On 3/4/15 11:51 AM, Antony Cleave wrote:
>> Hi
>>
>> I'm wondering how to do quad buffered Stereoscopic rendering with
>> virtualgl and which GPU I'd need.
>>
>> I will be configuring virtualgl on server in a machine room which is
>> part of a HPC system. Some of the nodes in the cluster will have K80M
>> cards in and one of those would be ideal. If that will not work then
>> there are alternative servers which can be used to accommodate suitable GPUs
>>
>> All of these servers will be headless and I've been told by nvidia that
>> their GPUs do not support stereo when no physical heads are available
>> and I'm waiting for them to confirm if this is a hardware limitation or
>> not i.e. if I HAVE to use a quadro card or whether a GRID K2 card might
>> be usable. I was wondering if there was anyone on the list who has ever
>> tried it and might already know.
>>
>> I currently don't have the exact hardware to test, I've been using good
>> old Tesla M2090 GPUs for the majority of my VirtualGL testing and they
>> work perfectly for everything else but when I tried to configure these
>> to accept some kind of stereo option it refuses point blank with "Stereo
>> not supported with NoScanout; disabling Stereo" which I assume is a
>> show-stopper.
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