https://bugs.kde.org/show_bug.cgi?id=462860

--- Comment #30 from Hexagon <apri...@posteo.net> ---
(In reply to Noah Davis from comment #28)
> (In reply to Hexagon from comment #25)
> > Thanks for the fix. Unfortunately the fix seems to not work for my monitor
> > configuration. In my case the problem is still identical.
> > - I am using spectacle 23.04.1-1 from the Archlinux repository. 
> > - My left monitor is 2560x1440px with a scaling factor of 150%
> > - My center monitor is 3840x2160px with a scaling factor of 200%
> > - The artifact can be seen on the center monitor as screenshotted in a
> > duplicate bug report of me: https://bugs.kde.org/show_bug.cgi?id=468912
> 
> I can't test your exact configuration since one of my screens only goes up
> to 1920x1080. Can you try setting the left screen to 1920x1080 at 150%? I
> was unable to reproduce the bug using 1920x1080 at 150% and 3840x2160 at
> 200%.

Unfortunately Plasma does not let me set my monitor to 1920x1080. Although
xrandr lists it as a supported option. On Windows I can set the monitor to
1920x1080. There seems to be a EDID problem. But I tried other combinations:

- Middle monitor always 3840x2160 at 200%
- Left monitor at 2560x1440 at 100% --> ok
- Left monitor at 2560x1440 at 125% --> ok
- Left monitor at 2560x1440 at 150%, 175% and 200% --> all of them problematic
- Left monitor at 1280x720 at 100%, 125%, 150%, 175% and 200% --> all of them
problematic
- Left monitor at 800x600 at 100%, 125%, 150%, 175% and 200% --> all of them
problematic
- Left monitor at 640x480 at 100%, 125%, 150%, 175% and 200% --> all of them
problematic

So right now it seems almost all combinations are broken and only some are
working.

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