31 lines
1.1 KiB
Org Mode
31 lines
1.1 KiB
Org Mode
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#+title: Disable the IBM TrackPoint
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#+setupfile: ../../headers
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* Disable the IBM TrackPoint
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My ThinkPads come with IBM’s TrackPoint, the little red nub sitting
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between the =G=, =H= and =B= keys. I don’t want it active, though, it has a
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drift and I cannot fix it unless I change my keyboard. Thus, this
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module exposes a way to turn it off. Here’s the skeleton of the
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=nixos.disable-ibm-trackpoint= module.
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#+begin_src nix :tangle yes
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{
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flake.modules.nixos.disable-ibm-trackpoint = {
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<<udev-rule>>
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};
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}
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#+end_src
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** Disabling the TrackPoint
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The TrackPoint shows up to the input stack as a regular pointer
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device, so to disable it I can’t simply blacklist a driver — libinput
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and friends would still pick it up through =evdev=. Instead, I match it
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by its device name and clear the =ID_INPUT=, =ID_INPUT_MOUSE= and
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=ID_INPUT_POINTINGSTICK= udev properties on it, which tells the input
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stack to simply ignore the device as a pointing device.
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#+name: udev-rule
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#+begin_src nix
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services.udev.extraRules = ''
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ATTRS{name}=="*TPPS/2 IBM TrackPoint", ENV{ID_INPUT}="", ENV{ID_INPUT_MOUSE}="", ENV{ID_INPUT_POINTINGSTICK}=""
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'';
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#+end_src
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