[Plasma 6.5.2] plasma-shell constant 100% cpu usage

Help
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1

I updated my KDE neon packages to use Plasma 6.5.2 and now entire system is very laggy.

This is what top is showing:

obraz

2

Removing all desktop widgets helped. Not sure which one caused 100% CPU usage.

Prior to version 6.5.2 all widgets worked fine.

3

Have a look in ~/.cache/ Is a file called ksycoca6_* being constantly deleted/regenerated? This is what was happening to me.

I put this down to the crashHandler in src/kbuildsycoca/kbuildsycoca_main.cpp. I can’t post a link - not allowed

I got rid of all the errors reported by running kbuildsycoca6. The 100% CPU would not go away. The fault for me lay in the KDE system config as adding a new user gave the same symptoms for that user too.

In the end, I reinstalled KDE. A solution, but not a good one.