> I have the problem, that about 20 sec after every login Plasma freezes
> for about 30 sec. All other windows work fine.
> The ≈30 sec points to a timeout-problem, but I have absolutely no glue
> what’s the reason.
It's the same for me. After several attempts, I found out it's KDE Connect.
#apt purge kdeconnect solves the problem for me.
Since I want to continue using KDE Connect, I'll keep looking for a solution.
--
Gruß
Helge