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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - 2560x1440 @144Hz graphic glitches and bad refresh rate"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93826#c74">Comment # 74</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - 2560x1440 @144Hz graphic glitches and bad refresh rate"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93826">bug 93826</a>
from <span class="vcard"><a class="email" href="mailto:kees.aarts1@hotmail.com" title="kees.aarts1@hotmail.com">kees.aarts1@hotmail.com</a>
</span></b>
<pre>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..</pre>
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