Comment # 1 on bug 104770 from Thomas Rohloff

Maybe this is helpfull, too:

OpenGL vendor string: X.Org
OpenGL renderer string: AMD CAYMAN (DRM 2.50.0 / 4.14.14, LLVM 5.0.1)
OpenGL core profile version string: 4.3 (Core Profile) Mesa 17.4.0-devel
(git-ec4bb693a0)