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How i can optimize the power consumption of the open source radeon driver? I don't want to use official amd driver cause of an error with sleep mode.

AMD E-450 cpu\gpu.

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askubuntu.com/questions/285434/… –  Qasim Jun 14 '13 at 14:47

2 Answers 2

up vote 3 down vote accepted

Open a terminal, and copy the following

echo dynpm|sudo tee /sys/class/drm/card0/device/power_method

If you do not like it, you can return back by using

echo profile|sudo tee /sys/class/drm/card0/device/power_method

If you want to set at boot, type

sudo gedit /etc/rc.local

and add before "exit 0"

echo dynpm > /sys/class/drm/card0/device/power_method

This may reduce the performance

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additional info on Dynamic frequency switching and power saving in general - https://wiki.archlinux.org/index.php/ATI

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