Comment # 55
on bug 93826
from iuno@posteo.net
(In reply to Pavel Bordukov from comment #54) > Doesn't work for me. Linux 4.11.3, R9 290x, Asus MG279Q, 144Hz has > flickering and dirty picture. 120Hz works well. I have a similar setup. Can you try what I posted above? Make sure to raise the DC clock above the default value, e.g. to 625 MHz (value 62500) If you use amdgpu: in amdgpu_atombios.c adev->clock.default_dispclk If you use radeon: in atombios_crtc.c rdev->clock.default_dispclk That should fix the broken image. To fix flickering, set mclk to high (echo 1 > /sys/class/drm/card0/device/power_dpm_force_performance_level)
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