{ pkgs, lib, ... }:
let

in
{
  # services.power-profiles-daemon.enable = true;
  # services.tlp = {
  #   enable = true;
  #   settings = {
  #     CPU_ENERGY_PERF_POLICY_ON_BAT = "powersave";
  #
  #     # Wireless power saving
  #     WIFI_PWR_ON_BAT = "1";
  #
  #     # USB autosuspend
  #     USB_AUTOSUSPEND = "1";
  #
  #     # SATA drive power management
  #     SATA_LINKPWR_ON_BAT = "min_power";
  #
  #     # PCI Express Active-State Power Management (ASPM)
  #     PCIE_ASPM_ON_BAT = "powersave";
  #
  #     # Runtime Power Management for PCI(e) buses/devices
  #     RUNTIME_PM_ON_BAT = "auto";
  #
  #     # Disable Bluetooth on battery
  #     # DEVICES_TO_DISABLE_ON_BAT = "bluetooth";
  #
  #     # Restore brightness on battery
  #     RESTORE_BRIGHTNESS_ON_BAT = "1";
  #     CPU_ENERGY_PERF_POLICY_ON_AC = "balance_performance";
  #     # CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
  #     CPU_ENERGY_PERF_POLICY_ON_SAV = "power";
  #     CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
  #     # PCIE_ASPM_ON_BAT = "powersave";
  #     CPU_SCALING_GOVERNOR_ON_AC = "balanced";
  #     PCIE_ASPM_ON_AC = "balanced";
  #     CPU_BOOST_ON_AC = 1;
  #     CPU_BOOST_ON_BAT = 0;
  #     CPU_BOOST_ON_SAV = 0;
  #     DEVICES_TO_DISABLE_ON_BAT_NOT_IN_USE = "bluetooth wifi wwan";
  #     INTEL_GPU_MIN_FREQ_ON_AC = 0;
  #     INTEL_GPU_MIN_FREQ_ON_BAT = 0;
  #     INTEL_GPU_MAX_FREQ_ON_AC = 2350;
  #     INTEL_GPU_MAX_FREQ_ON_BAT = 1100;
  #     INTEL_GPU_BOOST_FREQ_ON_BAT = 1100;
  #
  #     TLP_DEFAULT_BATTERY_MODE = "SAV";
  #     CPU_HWP_DYN_BOOST_ON_AC = 1;
  #     CPU_HWP_DYN_BOOST_ON_BAT = 0;
  #     CPU_HWP_DYN_BOOST_ON_SAV = 0;
  #     PLATFORM_PROFILE_ON_AC = "balanced";
  #     PLATFORM_PROFILE_ON_BAT = "low-power";
  #     PLATFORM_PROFILE_ON_SAV = "quiet";
  #     START_CHARGE_THRESH_BAT0 = 40; # 40 and below it starts to charge
  #     STOP_CHARGE_THRESH_BAT0 = 80; # 80 and above it stops charging
  #   };
  # };
  services.tuned = {
    enable = true;
  };
  services.thermald.enable = true;
  services.upower = {
    enable = true;
  };
  boot.kernelParams = [
    # "mem_sleep_default=deep"
    "i915.fastboot=1"
    "pcie_aspm=force"
    "ahci.mobile_lpm_policy=1"
  ];
  services.logind.settings.Login = {
    HandleLidSwitch = "suspend";
    HandleLidSwitchExternalPower = "suspend";
    HandleLidSwitchDocked = "ignore";
  };
  systemd.sleep.extraConfig = ''
        HibernateDelaySec=30min
    		SuspendEstimationSec=120
  '';

  systemd.services.rfkill-sleep-wake = {
    enable = true;
    description = "Using rfkill; disable all rf devices before sleeping.";
    before = [ "sleep.target" ];

    serviceConfig = {
      Type = "oneshot";
      ExecStop = ''${pkgs.utillinux}/bin/rfkill unblock all'';
      ExecStart = ''${pkgs.utillinux}/bin/rfkill block all'';
      RemainAfterExit = true;
    };
    wantedBy = [ "sleep.target" ];
    partOf = [ "sleep.target" ];

  };
  # one of "ignore", "poweroff", "reboot", "halt", "kexec", "suspend", "hibernate", "hybrid-sleep", "suspend-then-hibernate", "lock"
  powerManagement = {
    enable = true;
    # powertop.enable = true;
  };
}