How to avoid this Xvfb error: ES2 Prism: Error - GLX extension is not supported

[Eric Gunther]

On Mon, 2016-12-12 at 13:51 -0500, Long Vu wrote:
> On Mon, Dec 12, 2016 at 1:06 PM, Long Vu <long.vu at intelerad.com>
> wrote:
> > On Mon, Dec 12, 2016 at 12:20 PM, Adam Jackson <ajax at nwnk.net>
> > wrote:
> > > On Mon, 2016-12-12 at 12:13 -0500, Long Vu wrote:
> > > 
> > > > Would it be this xvfb-run option ?
> > > > 
> > > > -s ARGS   --server-args=ARGS        arguments (other than
> > > > server number and
> > > >                                     "-nolisten tcp") to pass to
> > > > the Xvfb server
> > > >                                     (default: "-screen 0
> > > > 640x480x8")
> > > > 
> > > > I am not familiar with X server options, what server args I
> > > > would need
> > > > to get rid of this "ES2 Prism: Error - GLX extension is not
> > > > supported"
> > > > error?
> > > 
> > > Yes, I think it would be:
> > > 
> > > xvfb-run -s "-screen 0 640x480x24" # ... whatever else you use
> > 
> > I tried xvfb-run -s "-screen 0 640x480x24", still the same error. 
> >  Any
> > other clues?
> > 
> > ES2 Prism: Error - GLX extension is not supported
> >     GLX version 1.3 or higher is required
> > Xlib:  extension "RANDR" missing on display ":99".
> > 
> > 
> > Now that I run at 24 bpp, maybe I should force GLX to be enabled? 
> >  Or
> > have to specify a GLX version, otherwise the default is less than
> > 1.3?
> > 
> 
> I bumped the resolution and manually try to enable GLX, still the
> same error.
> 
> xvfb-run -s '-screen 0 1024x768x24 +extension GLX +iglx' <command>
> 
> I don't know what else to try.
> 
> 
> -- 
> Long Vu | Build Controller | Intelerad | +1-514-931-6222 ext. 7743



I don't know if this will help, but previously adam had said:

> How are you launching Xvfb? I believe it defaults to 8bpp, but GLX
only
> works at 16 or 32bpp.

which I think you hadn't tried yet.


-eg 
>