Comment # 6 on bug 55416 from Krzysztof A. Sobiecki

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).