Bug 41420

Summary:	[UPSTREAM REPOST] radeon driver power management is very bad: GPU always runs at maximum clock speed
Product:	DRI	Reporter:	Hans Bakker <hansmbakker>
Component:	DRM/Radeon	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED INVALID	QA Contact:
Severity:	major
Priority:	medium	CC:	christopher.m.penalver
Version:	unspecified
Hardware:	All
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Hans Bakker 2011-10-03 08:49:39 UTC

[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.

Comment 1 Tomas Pospisek 2013-07-22 14:31:45 UTC

Does this change anything?: http://www.botchco.com/agd5f/?p=57
Available in kernel 3.11

Comment 2 Christopher M. Penalver 2016-02-26 06:13:10 UTC

Fix released downstream.

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