If you open the start menu via its button and later close it again via this button, the CPU utilization of plasmashell is normal as expected (approx. 1-1.5% CPU). However, if KickOff is open and you click on the empty desktop, the menu closes, but the CPU utilization of plasmashell remains high at approx. 18%. However, if an application is open and you click on it while KickOff is open, it closes and the CPU utilization of plasmashell is normal again (approx. 1-1.5% CPU). SOFTWARE/OS VERSIONS Operating System: openSUSE Leap 15.5 KDE Plasma Version: 6.0.2 KDE Frameworks Version: 6.0.0 Qt Version: 6.6.2 Kernel Version: 5.14.21-150500.55.52-default (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i3-7100U CPU @ 2.40GHz Memory: 11.5 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 620
Issue exists because of the migrated user profile after migration to Plasma6. New created user does not have this problem anymore. No Plasma6 issue at all.