With the latest update, plasma5-workspace has requires: kscreen5 >= 5.3.2.
However, due to KDE bug 340267 (https://bugs.kde.org/show_bug.cgi?id=340267),
having it installed corrupts the screen when using DisplayPort monitors.
Forcibly removing the package works around the bug and results in nothing more
than the screen configuration part of System Settings not appearing, which is
not an issue at all if you're using any other means of configuring screens
(xrandr, xorg.conf.d, proprietary drivers etc.), yet ignoring dependencies
makes YaST very unhappy.

Thus it would be better if KScreen5 was not a requires:, but a recommends:,
with a conflicts: kscreen5 < 5.3.2.