nixos/profiles/acpid.nix

   1 { config, lib, pkgs, ... }:
   2 {
   3 hardware.acpilight.enable = true;
   4 boot.kernelModules = [ "msr" "acpi_cpufreq" ];
   5 system.activationScripts.acPlug = ''
   6   PATH="${pkgs.kmod}/bin:$PATH"
   7   ${pkgs.acpi}/bin/acpi -a | grep -q 'Adapter .*: on-line' ||
   8   ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g powersave
   9 '';
  10 services.acpid = {
  11   enable = true;
  12   handlers = {
  13     brightnessDown = {
  14       event = "video/brightnessdown.*";
  15       action = "${pkgs.acpilight}/bin/xbacklight -dec 10";
  16     };
  17     brightnessUp = {
  18       event = "video/brightnessup.*";
  19       action = "${pkgs.acpilight}/bin/xbacklight -inc 10";
  20     };
  21   };
  22   acEventCommands = ''
  23     vals=($1)
  24     case ''${vals[3]} in
  25       00000000) # unplugged
  26         ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g powersave;;
  27       00000001) # plugged in
  28         ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g ondemand;;
  29     esac
  30   '';
  31 };
  32 }