DRC was correct. You need a 3D X server, which is your Xorg X11 server. And
you need a 2D server; either VNC or Xvfb, not both. If you goal is to use
Xvfb to capture images, then use Xvfb as the 2D server.
On Fri, Jan 10, 2014 at 1:53 PM, Stealthy <stealthmodei...@gmail.com> wrote:
> Checked my xorg.conf file and the driver is nvidia, see below.
>
> Section "Monitor"
>
> Identifier "Monitor0"
>
> VendorName "Unknown"
>
> ModelName "Unknown"
>
> HorizSync 28.0 - 33.0
>
> VertRefresh 43.0 - 72.0
>
> Option "DPMS"
>
> EndSection
>
>
> Section "Device"
>
> Identifier "Device0"
>
> Driver "nvidia"
>
> VendorName "NVIDIA Corporation"
>
> BusID "PCI:0:3:0"
>
> EndSection
>
>
>
> Section "Screen"
>
> Identifier "Screen0"
>
> Device "Device0"
>
> Monitor "Monitor0"
>
> DefaultDepth 24
>
> Option "UseDisplayDevice" "none"
>
> SubSection "Display"
>
> Virtual 1024 768
>
> Depth 24
>
> EndSubSection
>
> EndSection
>
> Not sure why it’s still using mesa.
>
> As to the use of turbovnc this is what I was told when I was setting this
> up:
> "VirtualGL needs two X servers-- a "3D X server" and a "2D X server." The
> 3D X
>
> server has to be a real X server attached to the GPU. It can be
>
> headless, but it can't be virtual. The 2D X server can be a virtual X
>
> server, such as VNC or Xvfb.”
>
>
> Isn’t this true? Are you saying I can just run everything through Xvfb and
> still have my application run through virtualgl and use the gpu? That would
> make things quite easier if that is possible.
>
> Thanks!
> --
> Desmond
>
> On Friday, January 10, 2014 at 3:53 AM, Kevin Van Workum wrote:
>
> It looks like your 3D X server (on :0) is not using the driver for your
> card. Make sure the "Device" section of xorg.conf has the correct driver
> and BusID specified. Secondly, I don't understand why you are using
> turbovnc. If you're trying to do captures with Xvfb, what's turobvnc for?
>
>
> On Thu, Jan 9, 2014 at 7:36 PM, Stealthy <stealthmodei...@gmail.com>wrote:
>
> Hi guys,
>
> So I am trying to run a 3d application using OPENGL through an EC2 server.
> The ultimate goal being to capture the screen using Xvfb.
>
> I installed virtualgl and turbovnc. when I run
> /opt/VirtualGL/bin/glxinfo -display :0 -c
>
> I get this
>
> name of display: :0
>
> display: :0 screen: 0
>
> direct rendering: Yes
>
> server glx version string: 1.4 Mesa 9.2.4
>
> server glx extensions:
>
> GLX_ARB_get_proc_address, GLX_EXT_texture_from_pixmap,
>
> GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
>
> GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_SGIX_fbconfig,
>
> GLX_SGIX_pbuffer
>
>
> client glx version string: 1.4 Mesa 9.2.4
>
> client glx extensions:
>
> GLX_ARB_get_proc_address, GLX_EXT_texture_from_pixmap,
>
> GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
>
> GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_SGIX_fbconfig,
>
> GLX_SGIX_pbuffer
>
> Obviously I don’t want to use Mesa. Do I have to start the X server in any
> specific manner to avoid using the MESA software renderer. Did I miss a
> step.
>
> Thanks for your help guys!
> --
> Desmond
>
> On Thursday, November 7, 2013 at 10:03 AM, Stealthy wrote:
>
> Thanks a lot for all the clarification, I’ll definitely spend more time
> in the manual. This is really helpful, I’ll take another stab at it.
>
> Thanks again!
>
> --
> Desmond
>
> On Wednesday, November 6, 2013 at 2:56 PM, DRC wrote:
>
> Yes, you're missing quite a lot. Please read the manual. VirtualGL
> needs two X servers-- a "3D X server" and a "2D X server." The 3D X
> server has to be a real X server attached to the GPU. It can be
> headless, but it can't be virtual. The 2D X server can be a virtual X
> server, such as VNC or Xvfb.
>
> Secondly, the way you launch a 3D application in VGL is by using vglrun,
> not vglclient. The instructions do not ever even specify calling
> vglclient directly. vglclient is generally called from vglconnect, but
> you don't need to ever use either of those unless your 2D X server and
> 3D X server are on different machines (which they aren't.)
>
> I'll summarize the steps you need to take (but please do read the manual.)
> -- Set up the 3D X server, which should be a "real" X server connected
> to the GPU. Make sure the GLX extension works by running glxinfo
> against the 3D X server and verifying that it is not using a software
> OpenGL renderer (Mesa.)
> -- Run vglserver_config to give VirtualGL access to the 3D X server
> (this is only necessary if the 3D X server is running some sort of login
> manager under the root account, like gdm or xdm. Otherwise, if you are
> just starting the 3D X server under your user account, then you should
> already have permission to access it.)
> -- Start Xvfb (the 2D X server.)
> -- Set DISPLAY to point to your Xvfb instance.
> -- vglrun {application}
>
>
> On 11/6/13 4:21 PM, Stealthy wrote:
>
> I am not sure I going through the right steps to enable virtualgl. Post
> installation I started the Xvfb server with this command:
>
> *Xvfb*:0.0 -screen 0 1280x720x24 -ac +extension GLX +render -noreset &
>
> I then started what I think is virtualgl with this command expecting any
> opengl application running after that would use the GPU:
>
> /opt/VirtualGL/bin/vglclient
>
> The application still only uses the CPU.
>
> Am I missing something?
>
> Thanks for the help btw.
> --
> Desmond
>
> On Wednesday, November 6, 2013 at 12:47 PM, DRC wrote:
>
> "Trouble initializing VirtualGL with Xvfb" tells me nothing. Please be
> specific as to the error messages you are encountering or what is not
> working as you expect.
>
>
> On 11/6/13 2:16 PM, Stealthy wrote:
>
>
> Hi guys,
>
> Hope I can get some help on this one. I have an ec2 instance running
> using a GPU cluster. I am capturing the Xvfb virtual screen using
> ffmpeg and would like to have my OPENGL enabled application use the
> GPU to render. It’s currently rendering everything using the CPU.
>
> I already installed virtualgl but I’m having some trouble intializing
> virtualgl with Xvfb and ensure the GPU is being used. Anybody could
> help on this?
>
> Thanks in advance
>
>
>
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> Kevin Van Workum, PhD
> Sabalcore Computing Inc.
> "Where Data Becomes Discovery"
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> 877-492-8027 ext. 11
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