https://bugs.kde.org/show_bug.cgi?id=395632
Bug ID: 395632
Summary: On RX Vega 64, KDE compositor does not run at 144Hz
even though monitor refresh rate is set to 144Hz
Product: kwin
Version: 5.12.5
Platform: Fedora RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: ben.r.x...@gmail.com
Target Milestone: ---
On my Fedora 28 system running a RX Vega 64 on open source drivers, the KDE
compositor seems to set the wrong refresh rate. I have a 144Hz monitor, but the
Kwin compositor seems to render at 60FPS. I have verified that the monitor is
indeed set to 144Hz via xrandr.
Moving windows around seems really laggy. If I disable the compositor, it feels
silky smooth (minus all the window repainting of course).
I am currently working around this issue by setting "MaxFPS=144" and
"RefreshRate=144" in kwinrc, but I think the failure to detect the proper
compositor refresh rate here is still a bug.
I will attach "xrandr" and "qdbus org.kde.KWin /KWin supportInformation" logs
shortly.
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