https://bugs.freedesktop.org/show_bug.cgi?id=73788
--- Comment #13 from Arek Ruśniak arek.rusi@gmail.com --- in my case it's error message in dmesg output only, performance is pretty the same.
kernel ver. 3.13 vs 12.8 lightsmark 245,42 245,84 unigine: valley 17,55 17,5 sanctuary 65,64 65,63 gputest: plot3D 16603 16555 furmark 1519 1520 triangle 96610 96541 pix. piano 127 127 pix. volplosion 1060 1060
powered by pts :)
hardware: i5-4670 + 8GB + radeon hd7770 + display@1680x1050 software: archlinux 64b/mesa-git-00c6720/llvm-svn-199943/ddx&glamor-8 days old/xserver-1.15/gnome3