I have KDE 5 which worked well since 2 months.
Today it suddenly began holding 100% of one CPU core and won't stop restarting.
Every time when I log in, my taskbar and desktop totally freeze during about 30s then crash down together. Luckily the search application bar and other components are still working.
I saw these two questions :
And tried two methods inside :
killall plasmashell; kstart plasmashell; exit sudo apt-add-repository ppa:kubuntu-ppa/backports sudo apt update && sudo apt full-upgrade -y
But it's always not better.
My environment :
Kubuntu 17.10 KDE Plasma 5.12.4 KDE Framework 5.44.0 Qt 5.9.1 Kernel 4.13.0-38-generic
Thanks for your help.