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nix-config/modules/hardware/input/disable-ibm-trackpoint.org
T
phundrak ba018ef841 refactor: change to litterate config
Configuration is now held by the `.org` files. All `.nix` files are
tangled from the org-mode files.
2026-10-06 12:40:58 +02:00

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Disable the IBM TrackPoint

Disable the IBM TrackPoint

My ThinkPads come with IBM’s TrackPoint, the little red nub sitting between the G, H and B keys. I don’t want it active, though, it has a drift and I cannot fix it unless I change my keyboard. Thus, this module exposes a way to turn it off. Here’s the skeleton of the nixos.disable-ibm-trackpoint module.

{
  flake.modules.nixos.disable-ibm-trackpoint = {
    <<udev-rule>>
  };
}

Disabling the TrackPoint

The TrackPoint shows up to the input stack as a regular pointer device, so to disable it I can’t simply blacklist a driver — libinput and friends would still pick it up through evdev. Instead, I match it by its device name and clear the ID_INPUT, ID_INPUT_MOUSE and ID_INPUT_POINTINGSTICK udev properties on it, which tells the input stack to simply ignore the device as a pointing device.

services.udev.extraRules = ''
  ATTRS{name}=="*TPPS/2 IBM TrackPoint", ENV{ID_INPUT}="", ENV{ID_INPUT_MOUSE}="", ENV{ID_INPUT_POINTINGSTICK}=""
'';