Fix desktop drive config

flake.nix

@@ -27,6 +27,7 @@
           ./hosts/nullbox/configuration.nix
           ./roles/remote.nix
           ./roles/desktop.nix
+	  ./fragments/hardware/nvidia-modeset.nix
         ];
       };
     };

fragments/hardware/nvidia-modeset.nix

@@ -0,0 +1,37 @@
+{ config, lib, pkgs, ...}:
+{
+  imports = [
+    ../opengl.nix
+  ];
+
+  # Load nvidia driver for Xorg and Wayland
+  services.xserver.videoDrivers = ["nvidia"];
+
+  hardware.nvidia = {
+
+    # Modesetting is required.
+    modesetting.enable = lib.mkDefault true;
+
+    # Nvidia power management. Experimental, and can cause sleep/suspend to fail.
+    powerManagement.enable = lib.mkDefault false;
+    # Fine-grained power management. Turns off GPU when not in use.
+    # Experimental and only works on modern Nvidia GPUs (Turing or newer).
+    powerManagement.finegrained = lib.mkDefault false;
+
+    # Use the NVidia open source kernel module (not to be confused with the
+    # independent third-party "nouveau" open source driver).
+    # Support is limited to the Turing and later architectures. Full list of 
+    # supported GPUs is at: 
+    # https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus 
+    # Only available from driver 515.43.04+
+    # Currently alpha-quality/buggy, so false is currently the recommended setting.
+    open = lib.mkDefault false;
+
+    # Enable the Nvidia settings menu,
+	# accessible via `nvidia-settings`.
+    nvidiaSettings = lib.mkDefault true;
+
+    # Optionally, you may need to select the appropriate driver version for your specific GPU.
+    package = lib.mkDefault config.boot.kernelPackages.nvidiaPackages.stable;
+  };
+}

hosts/nullbox/hardware-configuration.nix

@@ -33,7 +33,7 @@
   fileSystems."/.btrfsroot" =
     { device = "/dev/disk/by-uuid/e36d1ab4-d18b-434e-80b5-0efca0652eb5";
       fsType = "btrfs";
-      options = [ "subvolume=/" ];
+      options = [ "subvol=/" ];
     };
 
   swapDevices = [ ];