SUMMARY Repeat Keys is always On, a single key press held down will turbo press. When repeating keys is set Off. Not usual behavior it appears settings is ignored. Also tried Deleting config ~/.config/kcminputrc then rebooting. Not fixed. STEPS TO REPRODUCE 1. System Settings -> Input Devices -> Keyboard 2. Keyboard Repeat Turn Off 3. Apply OBSERVED RESULT xev shows key-releases when a key is held down. Deleting text with backspace deletes too quickly. Very annoying for text editing. EXPECTED RESULT Setting to work as intended, 1 hold key press to register as a single press event until released. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Neon User Edition 5.15.0 (available in About System) KDE Plasma Version: 5.15.0 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.0 ADDITIONAL INFORMATION
After testing another keyboard can confirm its a hardware fault.