Am 29.11.20 um 15:19 schrieb Stakanov:
no system tray. (....) Try the following (in case a file of the desktopshell was compromised: do like you described and then make sure that the default setting (restore last desktop session) is changed to "open a new session". Then the desktop should come up working (if it is like the times I experienced this problem, no guarantee of course).
I would also empty/erase the .cache folder (but from another user while that user is offline (e.g. with root) to make sure cache is reconstructed).
That did not help, but you gave me a good hint with "desktop session": According to https://userbase.kde.org/System_Settings/Desktop_Session I set "restore manually saved session" and that worked! I saved a working desktop session and after setting "restore manually..." the desktop starts fine now :-) best regards