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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [R9 270x] Intermittent flickering of entire screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73116#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [R9 270x] Intermittent flickering of entire screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73116">bug 73116</a>
from <span class="vcard"><a class="email" href="mailto:peter.garba@gemalto.com" title="peter.garba@gemalto.com">peter.garba@gemalto.com</a>
</span></b>
<pre>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.
hardware:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Curacao XT / Trinidad XT [Radeon R7 370 / R9 270X/370X]
Kernel: mainline 4.7.0-rc7
Drivers:
x11-drivers/xf86-video-ati-7.7.0
media-libs/mesa-12.0.1 (with radeon and radeonsi enabled)
x11-base/xorg-server-1.18.3</pre>
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