https://bugs.freedesktop.org/show_bug.cgi?id=82201
--- Comment #24 from Christian König deathsimple@vodafone.de --- (In reply to comment #23)
(In reply to comment #22)
do you have radeon.dpm=0 in smoe /etc/modprobe.d or somewhere like that file?
No: # grep -nHr radeon.dpm /etc/* /etc/default/grub:9:GRUB_CMDLINE_LINUX_DEFAULT="quiet radeon.dpm=1"
What's the result of "cat /sys/module/radeon/parameters/dpm" when you don't specify the "radeon.dpm=1" on the kernel commandline?