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My question is basically identical to this U&L Q&A titled: Enable numlock only for external keyboard, with a slight difference.

I have the solution running to enable Numlock whenever an external keyboard is plugged into my laptop etc., but I still occasionally type on the laptops keyboard, even with the external keyboard is plugged in.

How can I permanently set Numlock on the external keyboard while leaving the behaviour for other devices like the internal keyboard unchanged?

I'm not afraid of getting into driver programming eventually, if that's what it takes. Just make sure to point me somewhere where I can learn what to do next.

slm
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Peter Nerlich
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  • Outside of trapping every keypress, for eg.https://unix.stackexchange.com/questions/89538/how-to-tell-which-keyboard-was-used-to-press-a-key, and acting accordingly if it came form USB vs. nonUSB, I wasn't able to find a method that would do what you want. – slm Jul 29 '18 at 02:20
  • Might be useful, shows udev rules for when keyboard is plugged/unplgged in - https://bbs.archlinux.org/viewtopic.php?id=161455. – slm Jul 29 '18 at 02:21

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