Yes, the operative word there is "or". VNC or Xvfb or another X proxy. You
don't have to use VNC as your 2D X Server. Xvfb does work, although Xvfb has no
built-in image transport, so you would be on your own for delivering the pixels
from server to client.
> On Jan 10, 2014, at 12:53 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"
>> http://www.sabalcore.com
>> 877-492-8027 ext. 11
>>
>>
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