https://bugs.freedesktop.org/show_bug.cgi?id=97856
--- Comment #7 from Alex Henry tukkek@gmail.com --- Created attachment 126631 --> https://bugs.freedesktop.org/attachment.cgi?id=126631&action=edit Xorg log and dmesg from a radeon.dpm=1 boot
Rebooted my system as you've asked. /sys/class/drm/card0/device/power_method does indeed show "dpm" now (was "profile" last boot).
In my research so far, the only thing that I've saw in the logs that could have been related to this issue was the IOMMU warning in dmesg but as far as I can tell this isn't supported by my motherboard (asus-m5a78l-m-lx) since I can't find anything related on the BIOS setup utility.