Re: [VirtualGL-Users] Using VirtualGL as a transport AFTER rendering on the remote screen.

[Philippe <phi...@gm...>]

Hello,
I'm not sure to understand what you exactly want to do, but if I understand
it right, maybe the bumblebee-project is your solution :
https://github.com/Bumblebee-Project/Bumblebee

Keep us in touch !

On Wed, Oct 5, 2011 at 8:05 AM, DRC <dco...@us...>wrote:

> On 10/4/11 11:02 PM, Eric Appleman wrote:
> > Imagine I have a laptop with 2 GPUs. An Intel one connected to the LVDS,
> > VGA, and HDMI. And an Nvidia one connected to no physical output.
> >
> > Each GPU has its own X server. The Intel one (:0) is the primary one and
> > runs the visible desktop. The Nvidia one (:8) is started and stopped as
> > needed.
> >
> > What I'd like to do is the following:
> >
> > 1. Start the app on the invisible Nvidia desktop. Let it render here, on
> > that screen instead of the Intel one. VDPAU in particular does not
> > permit rendering on the Intel screen.
> > DISPLAY=:8 mplayer -vo vdpau file
> >
> > 2. Dump the already rendered window from :8 and display on :0
> > vglrun magic
> >
> > Is this possible? I looked into Xpra; it provides better performance
> > numbers, but the framerate makes it unusable.
>
> I really wonder about all of these laptops people are buying with the
> nVidia chip not connected to a display port.  What is supposed to be the
> purpose of that?  The short answer to your question is:  no, it's not
> possible.  VirtualGL doesn't transport any pixels except the rendered 3D
> pixels.  It relies on X11 for everything else.  Also, VirtualGL only
> understands the GLX and OpenGL APIs, and it only knows when to send a
> frame based on particular calls that are made to that API.  If an
> application, such as mplayer, is not using GLX or OpenGL, then VirtualGL
> would never know when to send the frames generated by that application.
>
> What you'd really need in order to accomplish the above would be another
> type of faker that understands the vpdau API.  Not exactly a generic
> solution, that.
>
>
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