enable gamemode

flake.nix

@@ -96,6 +96,7 @@
 								sound.enable = true;
 								prime =
 									{ enable = true; mode = "offload"; busId = { intel = "PCI:0:2:0"; nvidia = "PCI:1:0:0"; };};
+								gamemode.drmDevice = 1;
 							};
 							packages =
 							{

modules/hardware/default.nix

@@ -14,6 +14,7 @@ inputs:
 			mode = mkOption { type = types.enum [ "offload" "sync" ]; default = "offload"; };
 			busId = mkOption { type = types.attrsOf types.str; default = {}; };
 		};
+		gamemode.drmDevice = mkOption { type = types.int; default = 0; };
 	};
 	config =
 		let
@@ -140,5 +141,6 @@ inputs:
 					];
 				}
 			)
+			{ programs.gamemode.settings.gpu.gpu_device = "${toString hardware.gamemode.drmDevice}"; }
 		];
 }

modules/packages/default.nix

@@ -232,6 +232,24 @@ inputs:
 					anime-game-launcher.enable = true;
 					honkers-railway-launcher.enable = true;
 					nix-ld.enable = true;
+					gamemode =
+					{
+						enable = true;
+						settings =
+						{
+							general.renice = 10;
+							gpu =
+							{
+								apply_gpu_optimisations = "accept-responsibility";
+								nv_powermizer_mode = 1;
+							};
+							custom = let notify-send = "${inputs.pkgs.libnotify}/bin/notify-send"; in
+							{
+								start = "${notify-send} 'GameMode started'";
+								end = "${notify-send} 'GameMode ended'";
+							};
+						};
+					};
 				};
 			}
 		)