[Bug 73116] [R9 270x] Intermittent flickering of entire screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73116

--- Comment #6 from Pekka Vuorela <pvuorela at gmail.com> ---
(In reply to peter.garba from comment #5)
> It seems there is a problem with powersafe:
> 
> With auto:
> echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level
> 
> you will see heavy screen flickering on higher display resolutions (2560 x
> 1440). It's ok with 1920x1200.
> 
> With low or high:
> echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level or
> echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level
> 
> there is no screen flickering with all display resolutions.

This. Was almost ready to throw R9 270x I bought out of the window as unusable
until tested above.

Ubuntu 17.04, kernel 4.10.0, xserver-org-video-radeon/ati 7.9.0, mesa 17.0.3
etc.

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