Comment # 18 on bug 70706 from Joseph Yasi

I've also been seeing this with Xorg 1.15 and Mesa 10.2-devel and the Intel
2.99.910 driver with DRI3 enabled. It is very inconsistent. Logging in and out
of KDE a few times, and eventually glxinfo works, but often I get:
Error: couldn't find RGB GLX visual or fbconfig
Error: couldn't find RGB GLX visual or fbconfig

Desktop effects with kwin work inconsistently as well.