I read and tried this and it doesn't work for me!
when I type
echo "mid" > /sys/class/drm/card0/device/power_profile
I see what this value really changed (needs the chmod was applied before, that is missed in the text), when i type 'cat /sys/class/drm/card0/device/power_profile'.
But when I check again
cat /sys/kernel/debug/dri/0/radeon_pm_info
I see no changes! Frequencies are still at max. And yes,
/sys/class/drm/card0/device/power_method
is set to 'profile' (not 'dynpm').
How can I change frequencies?! Ubuntu 12.04, Radeon 6850.
