Comment # 74
on bug 93826
from kees.aarts1@hotmail.com
I have come here since my first git bisect learned me that commit 09be4a5219610a6fae3215d4f51f948d6f5d2609 causes problems on my system. I have a RX 460 and LG 38UC99-W and 3840x1600 @ 60hz gives no problem Running at 75hz (freesync) worked fine on 4.12-rc2 (I used 4.12 since at 4.11 or lower I could not use the displayport at all and was limited to 30hz via hdmi). But rc3 and up gave me flickering at the lowest +-7cm of the screen if something changes on the screen. A git bisect brought me to the commit mentioned above. echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level fixes the problem on 4.12-rc6 echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level also fixes the problem (did not expect that) echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level gives flickering..
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