That is all normal. The rmmod error is telling you that the nVidia
module is in use, which is why the subsequent message tells you to run
'rmmod nvidia' with the DM stopped in order to remove the module. That
is only necessary if you want to activate VGL without rebooting. Since
you rebooted, you're good.
The TurboVNC display will not have a GLX extension. That's why
VirtualGL exists. VirtualGL will redirect GLX calls from an OpenGL
application to display :0, which has a hardware-accelerated GLX extension.
Connect to the TurboVNC session and run
vglrun {your_application}
and it should work.
On 2/15/17 11:38 AM, Wei Liu wrote:
> Darrel,
>
> Thanks for the information. I followed your suggestion and created a
> xorg.conf file. Then I stopped the display manager, and run
> 'vglserver_config'. After answering questions, I got the following error:
>
> ====== vglserver_config output =======
>
> .. Creating /etc/modprobe.d/virtualgl.conf to set requested permissions
> for____
>
> /dev/nvidia* ...____
>
> ... Attempting to remove nvidia module from memory so device permissions____
>
> will be reloaded ...____
>
> *rmmod: ERROR: Module nvidia is in use by: nvidia_modeset nvidia_uvm____*
>
> ... Granting write permission to /dev/nvidia-uvm /dev/nvidia-uvm-tools
> /dev/nvid ia0 /dev/nvidia1 /dev/nvidia2 /dev/nvidia3 /dev/nvidia4
> /dev/nvidia5 /dev/nvidia 6 /dev/nvidia7 /dev/nvidiactl for all
> users ...____
>
> ... Granting write permission to /dev/dri/card0 for all users ...____
>
> ... /etc/X11/xorg.conf has been saved as /etc/X11/xorg.conf.orig.vgl ...____
>
> ... Modifying /etc/X11/xorg.conf to enable DRI permissions____
>
> for all users ...____
>
> ... /etc/lightdm/lightdm.conf has been saved as
> /etc/lightdm/lightdm.conf.orig.v gl ...____
>
> ... Adding display-setup-script=xhost +LOCAL: to
> /etc/lightdm/lightdm.conf ...____
>
> __ __
>
> Done. You must restart the display manager for the changes to take
> effect.____
>
> __ __
>
> IMPORTANT NOTE: Your system uses modprobe.d to set device permissions.
> You____
>
> must execute rmmod nvidia with the display manager stopped in order for
> the____
>
> new device permission settings to become effective.
>
> ===== end of vglserver_config =======
>
>
> I chose 'no' to all the questions, since I don't worry about security in
> our environment.
>
>
> Then I installed TubroVNC and run vncserver to get a new vnc session at
> port 3.
>
>
> If I run DISPLAY=:0 glxinfo, I can see direct rendering is yes, and glx
> vendor string is Nvidia, but if I run DISPLAY=:3 glxinfo, I got error
> "could not find RGB GLX visual or fbconfig".
>
>
> xdpyinfo -display :3 shows vendor string is TubroVNC...
>
>
> I also reboot the system, but got the same results. I attached the
> output log of runnining xdpyinfo and glxinfo on port 0 and 3
> respectively. (the file name has 0 and 3 for the port number).
>
>
> Did I miss anything? Where should I start troubleshooting?
>
>
> Thanks for the help!
>
>
>
>
>
> On Tue, Feb 14, 2017 at 11:53 PM, DRC <dcomman...@users.sourceforge.net
> <mailto:dcomman...@users.sourceforge.net>> wrote:
>
> You can use headless GPUs with VirtualGL. Install the nVidia
> proprietary drivers (I believe Ubuntu provides a package for these),
> then run:
>
> nvidia-xconfig -a --use-display-device=None --virtual=1920x1200
>
> (I don't think the resolution specified for --virtual matters, since
> it's headless.)
>
> Run vglserver_config to grant access to the X server while the display
> manager is sitting at the login prompt, then restart the display
> manager, and ideally you should be able to do
>
> xauth merge /etc/opt/VirtualGL/vgl_xauth_key
> DISPLAY=:0 glxinfo
>
> and glxinfo should report that it is using the nVidia OpenGL renderer.
>
> On 2/14/17 10:03 PM, Wei Liu wrote:
> > Hi VirtualGL users,
> >
> > I need your help on a set up of virtualGL, or decide if I can use
> > virtualGL to solve my problem.
> >
> > My setup: a Ubunt 14.04 server called 'roundvalley' has multiple Nvidia
> > GPUs for parallel computing, but they do not have any
> > VGA/DVI/DisplayPort and not connected to monitor. The only onboard-card
> > connected to a monitor does not have 3D capability, and Ubuntu
> > automatically load a kernel driver module (I forgot the module name) for
> > this onboard card.
> >
> > Client side is Windows. My goal is to use VNC to connect to the server
> > and run 3D application (need OpenGL) in my VNC session.
> >
> > My question is, can I configure virtualGL to use any of Nvidia GPU even
> > they are not used for display currently?
> >
> > I read the official document and found:
> > ==== user doc =====
> > 6.2 Using VirtualGL with Multiple GPUs
> >
> > VirtualGL can redirect the OpenGL commands from a 3D application to any
> > GPU in the server machine. In order for this to work, however, all of
> > the GPUs must be attached to different screens on the same X server or
> > to different X servers.
> > ====== end user doc ======
> >
> > Does it mean the GPU need to connect to physical screens, or some
> > definitions in X.org file?
> >
> > I appreciate your help.
> >
> > Thanks,
> > Wei
>
>
>
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