The script does work if I run it after starting a Plasma session.
I don't have any multi-head PCs with KDE & openSUSE except with TW. IOW, all my
Leaps are running TDE or KDE3, with TDM or KDM3, so I can't tell if Plasma in
openSUSE ever started up respecting the xrandr script. In Fedora 32 I have Plasma
on a 3 output PC, but it's using LightDM rather than SDDM.
I have one 15.2 with Plasma on a single head PC. The script is respected for the
purpose of specifying DPI.
If there's a bug here, whose is it?
TW but not Leap?
FWIW, in Debians I have the script in /etc/X11/Xsession.d/, but don't have KDE
on any of them anyway (TDE only, working as expected).
Suggestions? (not to include user-specific configuration in any form or manner)