I get
every few minutes on Kubuntu (KDE), and the panels disappear.
It restarts itself automatically, so it's not a real problem, just an annoyance, but it is a big annoyance.
I've tried sudo apt install --reinstall plasmashell plasma-desktop, but that made no difference.
When I try a backtrace from the error message, it says it's unable to produce a useful backtrace.
Try installing the latest version of Plasma as a backport:
sudo apt-add-repository ppa:kubuntu-ppa/backports
sudo apt update && sudo apt full-upgrade -y
First, if you have any non-standard plasma widgets, I would try to remove those.
Then, I would kill plasmashell process and then run it from the command line to see the full debug output.
to get a useful backtrace you need to install the *-dev related packages.
about widgets: potentially removing your whole panel, or widgets on your background and recreating a new panel if you want. is an option.
finally, you could inspecting your local plasma related config files.
$ find .config/ | grep plasma
.config/plasma-localerc
.config/plasmavaultrc
.config/plasma-org.kde.plasma.desktop-appletsrc
.config/plasmanotifyrc
.config/plasmarc
.config/plasmawindowedrc
.config/plasmawindowed-appletsrc
.config/plasmashellrc
.config/plasma-nm
you could back them up and move them away between restarts. I would start by .config/plasma-org.kde.plasma.desktop-appletsrc
hope this helps
In Kubuntu 22.04 (25th of April 2025) my plasmashell start to crash at every attempt to run, and keep crashing.
Mathieu J. advice helped to get it working again.
Open Konsole, and moved this file to home folder:
mv ~/.config/plasma-org.kde.plasma.desktop-appletsrc .
and run in Konsole:
plasmashell
It started, and get back to defaults, which I could modify, and I have working Desktop again.
