NixOS Thinkpad Dock

Small NixOS module for ThinkPads to perform certain tasks during docking and undocking on the docking station. Technically this is realized by creating an acpid handler.

Usage

This repository needs to be included in the NixOS configuration. An example follows.

{ config, pkgs, ... }:

{
  imports = [
    /path/to/nixos-thinkpad-dock
  ];

  hardware = {
    thinkpad-dock = {
      enable = true;

      # Those are needed for xrandr.
      environment = ''
        export DISPLAY=:0
        export XAUTHORITY=/home/user/.Xauthority
      '';

      # Add a second monitor while docking and remove it again.
      dockEvent = ''
        ${pkgs.xorg.xrandr}/bin/xrandr --output DP-2-1 --mode 1920x1080 --right-of eDP-1
      '';
      undockEvent = ''
        ${pkgs.xorg.xrandr}/bin/xrandr --output DP-2-1 --off
      '';
    };
  };
}