https://bugs.freedesktop.org/show_bug.cgi?id=77533
--- Comment #3 from glphvgacs darwinskernel@gmail.com --- (In reply to comment #1)
Please attach the corresponding Xorg.0.log and output of glxinfo.
It's hard to believe that commit causing the problem; it shouldn't make any functional difference.
true. that's the "last working" commit. a commit after that breaks things. ok, i'm gonna try with the very next commit.