Comment # 19
on bug 65963
from paul.woegerer@gmail.com
@Damian, I had the same problems. My configuration is similar to yours: Radeon 7870, Linux 3.16.1, xorg 1.16, MESA 10.3 RC1 (fedora f21 branch). After consulting https://wiki.archlinux.org/index.php/ATI it tried adding radeon.dpm=0 to my kernel command line as a workaround. It solved the problem. No more lockups. The system is now stable with the above configuration. Clearly this has something to do with the powermanagement changes in MESA and the kernel (there were no lockups with earlier versions of MESA)
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