Created attachment 841406 [details]
Plasma (X11)

Plasma doesn't start since the upgrade from TW 20200819 to 20200902, neither in
X11 or Wayland mode.

In X11 mode, the first error logged in the journal is

>Sep 05 00:57:15 localhost kapplymousetheme[3144]: Failed to create wl_display (No such file or directory)
>Sep 05 00:57:15 localhost kapplymousetheme[3144]: qt.qpa.wayland: Failed to initialize EGL display 3001

I attached the journal.

Plasma in Full Wayland mode doesn't start either, but doesn't log these errors.
Sway (Wayland) works. Another machine on TW 20200902 also works.

After Plasma failed to start in X11 mode, the SDDM greeter will become
unresponsive.

CPU: AMD Ryzen 5 3500U
Operating System: openSUSE Tumbleweed 20200902
KDE Plasma Version: 5.19.4
KDE Frameworks Version: 5.73.0
Qt Version: 5.15.0
Kernel Version: 5.8.4-1-default
OS Type: 64-bit