KMS Power Management have no effect

Submitted by Amadeus

Assigned to Default DRI bug account

Link to original bug (#52345)

Description

Using

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD SUMO2
OpenGL version string: 2.1 Mesa 8.0.3
OpenGL shading language version string: 1.20

AMD A4-3400 APU with Radeon(tm) HD Graphics
Fedora 17 64bit
Linux amd 3.4.5-2.fc17.x86_64 #1 (closed) SMP Mon Jul 16 20:52:08 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux


According to
http://wiki.x.org/wiki/RadeonFeature

should

echo profile > /sys/class/drm/card0/device/power_method
echo high > /sys/class/drm/card0/device/power_profile

put the GPU in high performance mode and

echo profile > /sys/class/drm/card0/device/power_method
echo low > /sys/class/drm/card0/device/power_profile

in low performance mode.

glxgears gives 60 FPS in both cases, which leads me to beleive that power management does work.