Thanks for answer
I tried your first recommendation in my run of VirtualGL to force
Pbuffer rendering
I made the changes in the steps 4 and 5 adding the variable DISPLAY=:0
4. I connect by ssh to pc1 and run crserver
ssh-XY clust...@192.168.1.11
export VGL_READBACK=0 DISPLAY=:0
vglrun crserver
5. I connect by ssh to pc2 and run crserver
ssh-XY clust...@192.168.1.12
export VGL_READBACK=0 DISPLAY=:0
vglrun crserver
About the second recommendation when I installed VirtualGL I ran
vlgserver_config and answered to the configuration NO in the three
questions
Restrict local X server access to vglusers group (recommended)?
[Y/n] n
Restrict framebuffer device access to vglusers group (recommended)?
[Y/n] n
Disable XTEST extension (recommended)?
[Y/n] n
When I ran all to proof these changes
The pc1 and pc2 shows these messages
In pc1
[clust...@pc1 ~]$ export VGL_READBACK=0 DISPLAY=:0
[clust...@pc1 ~]$ vglrun crserver
[VGL] ERROR: Could not open display :0.
In pc2
[clust...@pc2 ~]$ export VGL_READBACK=0 DISPLAY=:0
[clust...@pc2 ~]$ vglrun crserver
[VGL] ERROR: Could not open display :0.
Please help me I am researching about this problem but I don't find the solution
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