kmix uses 100% cpu from time to time (almost every second day, usually shortly after start of Kubuntu or VBox). This error has been already reported here 4 years ago and has been marked there as solved: https://bugs.kde.org/show_bug.cgi?id=288675 Reproducible: Sometimes
Reproducible with VBox V5. Kmix runs 100% when starting VBox and slows down when closing VBox. Workaround: kill kmix process.
I can confirm this problem: Platform: Fedora 22 Kernel: 4.2.8-200.fc22.x86_64 Kmix: 15.04 The whole Plasma 5 session becomes unuseable until I kill Kmix.
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.