Hi Malvin, > > > I have now upgraded three different machines from (fully updated) Buster > > > to Bullseye, and all three times KDE Plasma was not usable afterwards.
And I have now tried the update myself, successfully: - install debian buster wit KDE desktop - log into plasma, play around - do as you suggested apt upgrade --without-new-pkgs && apt full-upgrade - reboot - log into plasma, this takes a bit of time in my VM, but at the end Plasma is running without visual glitches and errors. Are you sure you have rebooted after the update? And, the question is even more interesting now: > Do you know which set of packages you had installed? Which meta-package? Best Norbert -- PREINING Norbert https://www.preining.info Fujitsu Research + IFMGA Guide + TU Wien + TeX Live + Debian Dev GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13