nixos/powertop: add hooks to fix incorrect configurations (dab01f87) · Commits · nix / nixpkgs

nixos/modules/tasks/powertop.nix

+34 −1

Original line number	Diff line number	Diff line
		@@ -13,7 +13,38 @@ in
		{
		###### interface

		options.powerManagement.powertop.enable = mkEnableOption "powertop auto tuning on startup";
		options.powerManagement.powertop = {
		enable = mkEnableOption "powertop auto tuning on startup";

		preStart = mkOption {
		type = types.lines;
		default = "";
		description = ''
		Shell commands executed before `powertop` is started.
		'';
		};

		postStart = mkOption {
		type = types.lines;
		default = "";
		example = ''
		''${lib.getExe' config.systemd.package "udevadm"} trigger -c bind -s usb -a idVendor=046d -a idProduct=c08c
		'';
		description = ''
		Shell commands executed after `powertop` is started.

		This can be used to workaround problematic configurations. For example,
		you can retrigger an `udev` rule to disable power saving on unsupported
		USB devices:
		```
		services.udev.extraRules = ''''
		# disable USB auto suspend for Logitech, Inc. G PRO Gaming Mouse
		ACTION=="bind", SUBSYSTEM=="usb", ATTR{idVendor}=="046d", ATTR{idProduct}=="c08c", TEST=="power/control", ATTR{power/control}="on"
		'''';
		```
		'';
		};
		};

		###### implementation

		@@ -24,6 +55,8 @@ in
		after = [ "multi-user.target" ];
		description = "Powertop tunings";
		path = [ pkgs.kmod ];
		preStart = cfg.preStart;
		postStart = cfg.postStart;
		serviceConfig = {
		Type = "oneshot";
		RemainAfterExit = "yes";