Date: Mon, 03 Oct 2016 17:11:17 -0500 From: Scott Bennett <bennett@sdf.org> To: freebsd-x11@freebsd.org, isoa@kapsi.fi Subject: Re: NVidia + run X apps from jail Message-ID: <201610032211.u93MBHwA024530@sdf.org> In-Reply-To: <cccd3de7be9a2910e78d0c07ea58ee68@kapsi.fi> References: <20161003021517.GB92917@pf-bsd.local> <201610030717.u937HJ3Q018671@sdf.org> <cccd3de7be9a2910e78d0c07ea58ee68@kapsi.fi>
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Arto Pekkanen <isoa@kapsi.fi> wrote:
Please do *NOT* top-post!
> The problem is more complicated than that.
>
> A FreeBSD jail fully prevents applications from accessing the graphics
> device. This means you must run the X-server outside of the jail, and
> then have the X applications connect to it from within the jail.
>
> The applications cannot access the direct rendering capabilities of the
> GPU, because the GPU device is not available inside the jail (is outside
> the jail or in another computer entirely). This means that OpenGL
> applications cannot work UNLESS the GPU specific OpenGL library supports
> AIGLX. AIGLX allows sending OpenGL data over X11 client server
> connection, so that the graphics are rendered indirectly by the server
> instead of the application using the GPU directly. I know that the Open
> Source drivers such as i915 and radeon support AIGLX, but I am not sure
> if nVidia supports it. Read more on AIGLX here:
> https://en.wikipedia.org/wiki/AIGLX
Well, if he uses a driver whose only support for the hardware is VESA,
I doubt it can help. If he uses a driver that fully supports the hardware,
then other options may open up.
>
> To verify whether nVidia supports AIGLX, ie. OpenGL over X11 network
> connection, you should try installing the nvidia-driver package inside
> the jail where you run the applications. The nvidia-driver package
> provides nVidia specific libGL, which might be required to have
> compatible AIGLX implementation in both server and client end.
>
> If installing nvidia-driver inside the jail does not enable OpenGL
> applications to run, then I assume the proprietary nVidia driver does
> not support AIGLX.
>
> And regardless if you get AIGLX working or not, it is a suboptimal
> solution to remote or indirect rendering of OpenGL. The better way is to
> use VirtualGL:
> http://www.virtualgl.org/About/Introduction
>
> I've used VirtualGL to run OpenGL applications from a headless server on
> a laptop with a GPU, full hardware acceleration. I won't be acting as
> your technical support, but I just suggest you read the manuals, google
> a bit and do your own research on this.
>
All that is interesting, but again, he needs to install the correct
driver, not the current nvidia-driver, which doesn't support his graphics
card (except as VESA).
Scott Bennett, Comm. ASMELG, CFIAG
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