[Feature request] add auto mode

[Seom1177]

Description

This feature allow users to select an auto mode, which would automatically detect the laptop's current mode; for example, if the laptop is running on battery power, it would use "integrated" mode, and if it is plugged into AC power, it would use "hybrid" mode.

Approaches

1. Detect whether the device is running on AC power or battery power, and depending on whether it's using battery power, use the integrate mode; if it's using AC power, use the hybrid mode (systemd-logind).
2. Using the ppd/tuned modes... if the user sets the mode to battery (integrated), balanced (hybrid), or performance (manual), this might be a little more complicated.

Note: As a reference, the goal is to mimic the behavior of the ghelper/armoury crate, but without the "ultimate" mode.

[chrispouliot]

This would be neat. Here is how I am currently managing setting to performance mode and cardwire to hybrid when gaming and then back to integrated and balanced through a gamemoderun start/end script on NixOS. Would be neat for it to automatically do it though, but I would want to have the option for it to set to Hybrid mode for performance and integrated for balanced/power save in my case.

{ pkgs, inputs, ... }:

let
  cardwire = inputs.cardwire.packages.${pkgs.system}.default;

  gamemode-start = pkgs.writeShellScript "gamemode-start" ''
    ${pkgs.asusctl}/bin/asusctl profile set Performance
    ${cardwire}/bin/cardwire set hybrid
  '';

  gamemode-end = pkgs.writeShellScript "gamemode-end" ''
    ${pkgs.asusctl}/bin/asusctl profile set Balanced
    ${cardwire}/bin/cardwire set integrated
  '';
in
{
  programs.gamemode = {
    enable = true;
    settings = {
      custom = {
        start = "${gamemode-start}";
        end = "${gamemode-end}";
      };
    };
  };
}

[luytan]

will be in the next release