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.
------------------------------------------------------------------------------
Dive into the World of Parallel Programming The Go Parallel Website, sponsored
by Intel and developed in partnership with Slashdot Media, is your hub for all
things parallel software development, from weekly thought leadership blogs to
news, videos, case studies, tutorials and more. Take a look and join the
conversation now. http://goparallel.sourceforge.net/
_______________________________________________
VirtualGL-Users mailing list
VirtualGL-Users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtualgl-users
