Comment # 9 on bug 1205742 from Fabian Vogt

(In reply to Robin Klitscher from comment #8)
> (In reply to Fabian Vogt from comment #5)
> > You can try to run "kwin_x11" manually and/or look at "systemctl --user
> > status plasma-kwin_x11.service".
> 
> kwin_x11 returns:
> 
> ���������kwin_x11: symbol lookup error: /usr/lib64/libkwin.so.5: undefined symbol:
> drmModeFormatModifierBlobIterNext���������

That means you did not switch over all packages to the KDE repos. You *must*
set them as higher priority (lower value) than other repos and run "zypper -v
dup --from <KDE:Frameworks repo name>".