What option did you select in vglserver_config?  What was the full 
output of vglserver_config?  Which version of the nVidia drivers do you 
have installed?

vglserver_config installs a file under /etc/modprobe.d that is supposed 
to set the permissions on /dev/nvidia*.  If you haven't restarted the 
machine after running vglserver_config, that is the first thing I would 
try, although technically it shouldn't be necessary.

People have been running VGL successfully on CentOS/Red Hat 6.x for 
quite a while, and this is the first I've heard of any issue like this.


On 1/13/14 7:26 AM, jupiter wrote:
> Hi,
>
> I installed virtualgl 2.3.1 on CentOS 6.4, I made vglserver_config to
> open and SELinux is disabled. But I got error "NVIDIA: could not open
> the device file /dev/nvidiactl (Permission denied)" when I run "vglrun
> glxgears". I changed /dev/nvidiactl to 0666, but it changed back to to
> following access permission after calling vglrun.
>
> crw-rw---- 1 root vglusers 195, 255 Jan 10 12:52 /dev/nvidiactl
>
> I added user account to vglusers group, but no avail.
>
> Is the access permission enforced by virtualgl? Any workaround to
> remove access restrictions temporary to let me test nvidia set up via
> turbovnc connection?
>
> Thank you.
>
> Kind regards.

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