SUMMARY Upower problems can cause Dolphin and other KDE components work very slowly and it's very hard to investigate and found. STEPS TO REPRODUCE 1. Crash upower daemon OBSERVED RESULT Dolphin is starting 1 minute or more EXPECTED RESULT It should start instantly or should display error (for example in terminal), with reason of problem. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon 5.22 ADDITIONAL INFORMATION Problem details I've found are explained https://fungos.github.io/dolphin-deep-dive/