Re: [VirtualGL-Users] [VGL] ERROR: glXCreateContextAttribsARB symbol not loaded

[Nathan K. <nat...@sp...>]

On 13/03/15 11:25 AM, Alex Xu wrote:
> I get the aforementioned error when running almost anything through
> VirtualGL through various methods (SSH X11 forwarding and local VNC).
> 
> Specifically, running "vglconnect -s <host> <<< 'vglrun glxinfo'"
> results in this error.
> 
> However, running "ssh <host> <<< 'DISPLAY=:0 glxinfo'" shows that
> GLX_ARB_create_context is in fact provided by the graphics driver and
> should be available.
> 
> Furthermore, running "vglconnect -s <host> <<< 'vglrun glxgears'" does
> work (i.e. output to the connecting machine) and is much faster than
> indirect rendering.
> 
> I tried Googling for it, but all I found was "update your graphics
> drivers" and "use the proprietary drivers". I am using the latest
> drivers, xf86-video-intel-2.99.217, and there are no proprietary drivers.
> 
> What troubleshooting steps could I take to narrow down the problem?

Funny timing: I just posted a patch for that the other day.  The VGL
nightly page that my search engine pulls up doesn't have that change, so
you'll either have to wait for a build with that patch included or if
that's something you can do, build the latest trunk yourself.

I haven't personally tested VirtualGL with Intel drivers, so I don't
know if you'll hit any other issue after solving that one.  I have used
Mesa + nouveau.

-Nathan