Created attachment 92619 [details]
dmesg.log

Running Unigine Heaven 3.0 causes GPU lockup after 1-2 seconds. This happens
only if dpm is enabled. GPU can be restored to a normal operation only via
system reboot.

My software:

linux-3.12.8 && linux-3.13.0
mesa-10.0.2
llvm-3.4
xf86-video-ati-9999 (latest git)
glamor-9999 (latest git)
libdrm-2.4.50
xorg-server-1.14.3

My hardware:

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Cape Verde PRO [Radeon HD 7750] [1002:683f]