SUMMARY Sync works when I select any other cursor theme than the default. When selecting "Breeze" then "Apply Plasma Settings" in SDDM KCM, SDDM displays the default Adwaita cursor. I think the problem is when cursor theme is set to Breeze (the KConfig default), kcminputrc won't contain the cursor theme line. But seems SDDM has a different default for this setting. So when syncing, that line should be added if missing.
Same Problem, Plasma 6.0 on Wayland. In fact it does not sync anything, like #467039
Can confirm with sddm 0.21.0-4 and Plasma 6.0.1
This happens because your alternative cursor themes are installed in your home folder, not a place that SDDM can see. It requires Bug 447171 to be fixed. *** This bug has been marked as a duplicate of bug 447171 ***
My mistake, I mis-read it.
It's now working in Plasma 6.1 _if_ SDDM is running in Wayland with the following options: ``` [General] DisplayServer=wayland GreeterEnvironment=QT_WAYLAND_SHELL_INTEGRATION=layer-shell [Wayland] CompositorCommand=/usr/bin/kwin_wayland --drm --no-lockscreen --no-global-shortcuts ``` It's not fixed in SDDM's default X11 mode. When the cursor is set to Breeze, it's Adwaita in SDDM. But setting the cursor to other themes works.
For me to be able to use Breeze in SDDM (in wayland mode like the comment previous) I had to select a different cursor theme, apply plasma settings to SDDM, set cursor theme back to Breeze, then apply plasma settings to SDDM again. For anyone who happens to come across this bug report trying to get Breeze to work on SDDM.