https://bugs.freedesktop.org/show_bug.cgi?id=89944
--- Comment #4 from qaridarium thomas.frech.qaridarium@gmail.com --- I think I do have the same problem.
http://www.phoronix.com/forums/showthread.php?116700-HD7850-radeon-oibaf-ppa...
I do have a hd7850 and I use the oibaf PPA to run the GIT code