I had already tried this approach for disable numlock but does not work. I solved it only by running numlockx in the auto-start directory (after the kde desktop was started).
- Bug#942654: kde-baseapps: Numlock state not changed per s... Brian R.
- Bug#940872: Bug#942654: kde-baseapps: Numlock state ... Diederik de Haas
- Bug#942654: Bug#940872: KDE Frameworks 5.62 coming t... Antonio

