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   deps = [ "modprobe" ];
   7   text = ''
   8     PATH="${pkgs.kmod}/bin:$PATH"
   9     modprobe msr
  10     modprobe acpi_cpufreq
  11     ${pkgs.acpi}/bin/acpi -a | grep -q 'Adapter .*: on-line' ||
  12     ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g powersave
  13   '';
  14 };
  15 services.acpid = {
  16   enable = true;
  17   handlers = {
  18     brightnessDown = {
  19       event = "video/brightnessdown.*";
  20       action = "${pkgs.acpilight}/bin/xbacklight -dec 10";
  21     };
  22     brightnessUp = {
  23       event = "video/brightnessup.*";
  24       action = "${pkgs.acpilight}/bin/xbacklight -inc 10";
  25     };
  26   };
  27   acEventCommands = ''
  28     vals=($1)
  29     case ''${vals[3]} in
  30       00000000) # unplugged
  31         ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g powersave;;
  32       00000001) # plugged in
  33         ${pkgs.linuxPackages.cpupower}/bin/cpupower frequency-set -g ondemand;;
  34     esac
  35   '';
  36 };
  37 }