Bug 38465 - Display flickers when setting power_profile
Summary: Display flickers when setting power_profile
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2011-06-19 01:47 UTC by Christoph Brill
Modified: 2019-11-19 08:19 UTC (History)
3 users (show)

See Also:
i915 platform:
i915 features:


Description Christoph Brill 2011-06-19 01:47:41 UTC
When calling something like

echo "low" > /sys/class/drm/card0/device/power_profile

my display flickers a single time. This is okay-ish, but on Microsoft Windows the clock changes do not cause such a flicker. There has to be some kind of trick to achieve that and it would be great if this would work an Linux, too.

Tested on vanilla kernel 2.6.39 with libdrm 2.4.26 and xf86-video-ati 6.14.2.
Comment 1 Benjamin Bellec 2011-06-28 11:46:58 UTC
I have this behavior too.
Comment 2 Erdem U. Altınyurt 2012-05-15 17:25:36 UTC
I have this flickering issue too on my HD8650.
But not only moving to high to low profile. It flickers low to high profile too! This doesn't let us use "dynpm"...

Using Kernel 3.3.5 with mesa/radeon/drm trunk.
Comment 3 Martin Peres 2019-11-19 08:19:29 UTC
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