Bug 38465

Summary: Display flickers when setting power_profile
Product: DRI Reporter: Christoph Brill <egore>
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: NEW --- QA Contact:
Severity: normal    
Priority: medium CC: b.bellec, jlp.bugs, ojab
Version: unspecified   
Hardware: Other   
OS: All   
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.

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