Can you explain why you're using Xvfb? If you're just trying to make a
video of your 3D application with ffmpeg, can't you just get it from the 3D
X server directly? For example:
ffmpeg -f x11grab -video_size cif -framerate 25 -i :0.0 /tmp/out.mpg
On Fri, Jan 10, 2014 at 3:26 PM, DRC <dcomman...@users.sourceforge.net>wrote:
> No, not the same display. The 3D X server and 2D X server need to be on
> different displays. Usually the 3D X server is on :0 if you have just
> one of them, and the 2D X server is on some other display number.
>
> I would suggest looking at the X server log to see if perhaps the nVidia
> driver is having difficulty starting up. I personally have no
> first-hand experience with EC2 instances. I know through user reports
> that VGL works with them, but I haven't ever actually tested this myself.
>
>
> On 1/10/14 1:55 PM, Stealthy wrote:
> >
> > Sounds good. So I’ll just start my X server like usual and point my Xvfb
> > server to the same display?
> >
> > About the Mesa issue below. You see anything abnormal in my xorg.conf
> > file below? Don’t understand why it’s still using Mesa when it should be
> > using hardware acceleration through the GPU.
> >
> > Thanks for the help guys!
> >
> > --
> > Desmond
> >
> > On Friday, January 10, 2014 at 11:53 AM, Kevin Van Workum wrote:
> >
> >> 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
> >> <mailto: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
> >>>> <mailto: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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> >>>>>>
> >>>>>
> >>>>>
> >>>>>
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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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> >>>> https://lists.sourceforge.net/lists/listinfo/virtualgl-users
> >>>
> >>>
> >>>
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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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> >
> >
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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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