https://bugs.kde.org/show_bug.cgi?id=446478
--- Comment #2 from Eduard <e.bachma...@gmail.com> --- I forgot to mention: There's nothing obvious in the logs for kernel, X, krunner, kwin, xsession, etc. But one of the symptoms becomes visible once gsync is enabled: You start seeing entries like (EE) event3 - DELL Dell USB Entry Keyboard: client bug: event processing lagging behind by 31ms, your system is too slow for mouse and keyboard despite <5% cpu utilization per core. -- You are receiving this mail because: You are watching all bug changes.