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I have installed the above mentioned OS on a 15-year old IBM Thinkbad (t-43 / 1871 series).

I only care about the CAPS lock LED. Don't care about the others. Have reviewed some basic topics regarding setleds or similar but nowhere have I seen or understood exactly how to enable toggle. I have seen commands on how to manually turn the light on or off at will. That's silly, why should I have to do that. I want it to work the way it's supposed to: toggle on/off so that I know when I'm in caps on or caps off mode.

Can anyone suggest what amendments I need to make so that I can enable it? I would prefer solutions that don't require downloading extra software (remember this is a text-only interface that I have) as I want to keep the system light. I could do with some light scripting I suppose, but I'm really hoping there is a line somewhere in a system file that I need to amend to make this work. Otherwise open to some more involved solutions I guess. Thanks!

  • Please test the LED with this command: echo 1 | sudo tee /sys/class/leds/input45\:\:capslock/brightness to see if that works. If it does, there's an answer for you at https://askubuntu.com/a/851093/197910 . As to your bonus question, please click [edit] and remove it, and make that a new question; house rules are, one issue per question, so the site becomes a giant FAQ. – K7AAY Sep 16 '19 at 21:12
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    Yes it works when I set it on off manually like that. Incidentally I have input::3 if that matters. Anyway thanks for the link. It seems a bit too much for something I will not need all that much now that I think about it. I feel a bit nervous running a script that executes every second to make the caps key led work. I don’t fully understand it yet so will reconsider. – user507866 Sep 16 '19 at 21:39
  • Well, I would slow it down to run every 5 secs if I was bothered by every second measurements, but there are so many other things going on in Linux I doublt this would be a problem even with a T43; and I have a lot of old slow Thunk Pads. – K7AAY Sep 16 '19 at 21:45
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