https://bugs.kde.org/show_bug.cgi?id=460329
wokim <mequer...@gmail.com> changed:
What |Removed |Added
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CC| |mequer...@gmail.com
--- Comment #6 from wokim <mequer...@gmail.com> ---
(In reply to dfodre from comment #5)
> (In reply to Ash from comment #2)
> > (In reply to Bug Janitor Service from comment #1)
> > > Thank you for the bug report!
> > >
> > > Please note that Plasma 5.25.5 is not supported for much longer by KDE;
> > > supported versions are 5.24, and 5.26 or newer.
> > >
> > > If at all possible please upgrade to a supported version and verify that
> > > the
> > > bug is still happening there.
> >
> > I will try out 5.26 soon. I had tried 5.25.5 last week alongside my GNOME
> > install of EndeavourOS before the new release to see if the issue had
> > resolved since earlier versions. I may add Plasma alongside my current
> > install again. If a fresh install is recommended I may make a fresh install
> > or resize my main partition, as I don't want to nuke my main install. I
> > could also try a different distro to test further.
>
> I think I found a correlation. Games that limit their framerates (for
> example, Sonic Frontiers or NFS Hot Pursuit Remastered being engine locked
> to 60fps) somehow make the display's refresh rate vary. Severity depends on
> the game, varies between a hitch every second to constant variation in
> display refresh rate. Locking the display's refresh rate to 60 for these
> games fixes the issue, but it's tedious.
>
> I am using Arch Linux, Mesa RADV driver version 22.3.2-3 on an RX 5700, KDE
> Plasma 5.26.5. This happens both on Wayland and X11. VRR is set to
> automatically apply on Wayland.
>
> Not only does this cause display brightness flicker, but also extremely
> uneven frame pacing.
Have you tried forcing the shader and memory clocks to be constant? E.g. by
doing as root: `echo profile_standard >
/sys/class/drm/card0/device/power_dpm_force_performance_level`. You could also
try `profile_peak` for max clocks. It seems that the dynamic reclocking (to
save power) causes uneven frame delivery, which causes (brightness) flickering
and stuttering with VRR.
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