https://bugs.freedesktop.org/show_bug.cgi?id=103968
--- Comment #7 from Michel Dänzer michel@daenzer.net --- (In reply to Odo Wolbers from comment #6)
Under /usr/local I found quite some files which look related to GL with a date of the last tweakings (22.Nov). Does it make sense to just delete everything from this date?
Yes, try that. If it doesn't help, provide the output of
LIBGL_DEBUG=verbose glxinfo | grep ' render'