https://bugs.freedesktop.org/show_bug.cgi?id=55416
--- Comment #6 from Krzysztof A. Sobiecki sobkas@gmail.com --- Around time, when I started using mesa:bb7ecb29fb6358a4c65278c2fe88936c578074cd, R600_LLVM=1 env var stopped causing GPU hang problems. I don't know if there is a link between this two facts, but for now I'm not willing to experiment with this(last time, when I have tried, computer crashed completely, not even pings and a package database have gone fishing).