[Bug 41420] New: [UPSTREAM REPOST] radeon driver power management is very bad: GPU always runs at maximum clock speed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=41420

           Summary: [UPSTREAM REPOST] radeon driver power management is
                    very bad: GPU always runs at maximum clock speed
           Product: xorg
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: hansmbakker at gmail.com
         QAContact: xorg-team at lists.x.org


[This is not my own bug, but I decided that it would be better to repost it
upstream from
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/825989. I
have the same problem with my laptop GPU.]

The clock frequency of the GPU is set to maximum by default and it is never
throttled back. This leads to a laptop battery that is drained quickly, an
unneccesary amount of heat produced, an annoying fan, etc etc.

Users can set the frequency through the command line like with 
echo dynpm > /sys/class/drm/card0/device/power_method
but most users don't know about this.

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