Added nvidia drivers and gaming profile

system/hosts/reykjavik/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ./hardware.nix
+    ./nvidia.nix
   ];
 
   # - Basic --------------------------------------
@@ -19,9 +20,12 @@
 
   # - Services -----------------------------------
 
-  samfelag.profiles.desktop = {
-    enable = true;
-    laptop = true;
+  samfelag.profiles = {
+    desktop = {
+      enable = true;
+      laptop = true;
+    };
+    gaming.enable = true;
   };
 
   system.stateVersion = "22.05";

system/hosts/reykjavik/nvidia.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, ... }:
+
+let
+  nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
+    export __NV_PRIME_RENDER_OFFLOAD=1
+    export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
+    export __GLX_VENDOR_LIBRARY_NAME=nvidia
+    export __VK_LAYER_NV_optimus=NVIDIA_only
+    exec "$@"
+  '';
+in
+{
+  environment.systemPackages = [ nvidia-offload ];
+
+  services.xserver.videoDrivers = [ "nvidia" ];
+
+  hardware.opengl.enable = true;
+  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
+
+  hardware.nvidia.prime = {
+    offload.enable = true;
+
+    # Bus ID of the Intel GPU. You can find it using lspci, either under 3D or VGA
+    intelBusId = "PCI:0:2:0";
+
+    # Bus ID of the NVIDIA GPU. You can find it using lspci, either under 3D or VGA
+    nvidiaBusId = "PCI:1:0:0";
+  };
+}