Hello,

I just have migrated my laptop from Debian buster to unstable. I'm using KDE with x11. At login I get a message that ksplashqml produced a segmentation fault.
Afterwards I get a black screen, but can add miniprograms (applets?) via mous right-click. This way I can add an application starter to the desktop and start applications as normal, even systemsettings. In systemsettings the Breeze theme is not shown, although all is installed if I look on synaptic (just the same plasma packages as I have installed on my desktop).

If I use Gnome it starts as normal, so I guess it is not a video driver setting but has something to do with the upgrade process - but I cannot find out what went wrong.

Regards,
trupf

To solve the issue I now have deinstalled everthing from plasma and kde and reinstalled again Now plasma is running without crash or black screen at startup.

I suspect the package plasma-calendar-addons beeing the cause - but I not sure as I have not tested it again. I have read something about plasma-calendar issues here https://www.reddit.com/r/kde/comments/isi2s6/event_calendar_making_latest_plasma_and_qt_crash/[1] and this is the only package I remember which was installed before but I didn't install again now.

Hope this help.

Regards,
trupf

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[1] https://www.reddit.com/r/kde/comments/isi2s6/event_calendar_making_latest_plasma_and_qt_crash/

Yes, the event calender also took down my Plasma some time ago ;-)
This is a problem with user installed widgets which we cannot really
control. I recommend looking into plasma-discover at times and check
whether there are updates for all the user installed stuff available.

Best

Norbert