How to ensure GLX extension in xfvb

[Andreas Tille <andreas@an3as.eu>]

Hi,

I'd like to fix the autopkgtest of njplot.  The current code in Git[1] is executing:

xvfb-run --auto-servernum --server-num=20 -s '-screen 0 1024x768x24 -ac +extension GLX +render' /usr/bin/njplot -psonly example.phb
X server has no GLX extension - required to use OpenGL!
autopkgtest [14:10:42]: test run-unit-test: -----------------------]
autopkgtest [14:10:42]: test run-unit-test:  - - - - - - - - - - results - - - - - - - - - -
run-unit-test        FAIL non-zero exit status 10
autopkgtest [14:10:42]: @@@@@@@@@@@@@@@@@@@@ summary
run-unit-test        FAIL non-zero exit status 10


Is there any hint what other option should be added to xvfb-run to let
this test finally succeed?

Kind regards

        Andreas.

[1] https://anonscm.debian.org/git/debian-med/njplot.git

-- 
http://fam-tille.de