Hi hefee, I think I found the cause for the Apparmor messages and the crash.
The package plasma-workspace needs the virtual package default-dbus-session- bus or dbus-session-bus. This dependency is fulfilled by the package dbus-user-session as well as by dbus-x11. On my system the package dbus-x11 was installed, which apparently triggers the messages or the rules of akonadi-server are aligned to dbus-user-session. I therefore installed the package dbus-user-session and then deleted dbus-x11. After that all messages except one and the akonadi server crashes do not occur anymore. The only message I continue to receive is: Mär 14 22:49:00 mcp kernel: audit: type=1400 audit(1615758540.971:29): apparmor="DENIED" operation="open" profile="/usr/bin/akonadiserver" name="/usr/ local/share/mime/mime.cache" pid=2305 comm=5468726561642028706F6F6C656429 requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 Maybe it should be pointed out that the Akonadi server can not be used with dbus-11. Many kind regards Sascha