Update to an existing KDE 5.5 / 5.19 install base ( dual screen, 256x1440 + 1920x1080 ): - Display configuration is broken, screens are locked at clone, 1680x1050. - Plasmashell completely broken. - Activities completely broken (cannot access the activity selection menu activity settings)
Clean install: - Display resolution and arrangement looks OK. - Default plasma configuration seem to work. - Activities still broken.