nixos/profiles/acpid.nix

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