I saw this happen with a similar setup in the past. It might have something to do with Xorg's VT's. Try starting Xorg with the '-novtswitch' option and specify a unique vt for each Xorg running.
On Mon, Oct 9, 2017 at 6:35 AM, Jafaruddin Lie <[email protected]> wrote: > Hi all > Simple question is if it is possible, on a single machine with multiple > GPUs, running different X servers on those GPUs, for multiple users to use > vglrun at the same time? > This is our current setup: > > 1 machine with 4 Nvidia K80 cards (latest drivers), running CentOS 7, > VirtualGL 2.5.2, TightVNC, and Mate Desktop. > > We have 2 xorg.conf (2 cards configured on each xorg.conf), and currently > we are testing whether we can bring up 2 desktop sessions via VNC. > The desktop loads, and we can see two different X servers running on those > 4 cards and the VNC servers running on different displays. > > The issue is with VirtualGL. The first user can do startx and run vglrun > glxgears, this will work fine. > When the second user startx, the first user's vglrun session will be > terminated with this error: > > [VGL] ERROR: OpenGL error 0x0502 > [VGL] ERROR: in readpixels--- > [VGL] 439: Could not read pixels > > The first user can run vglrun again once the second user stops their X > session. > My understanding is that with our setup, this should be do-able, right? > > Thanks. > > -- > You received this message because you are subscribed to the Google Groups > "VirtualGL User Discussion/Support" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/virtualgl-users/22d4cb38-e7ea-4512-89ca-01a761df9d4c%40googlegroups. > com > <https://groups.google.com/d/msgid/virtualgl-users/22d4cb38-e7ea-4512-89ca-01a761df9d4c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Kevin Van Workum, PhD Sabalcore Computing Inc. "Where Data Becomes Discovery" http://www.sabalcore.com 877-492-8027 ext. 1011 -- -- You received this message because you are subscribed to the Google Groups "VirtualGL User Discussion/Support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/virtualgl-users/CAHom8ytD4%3DjZdH897eFYreiQcXZ0fRn2zGWiJtq1GzuA_tppoQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
