feat: nvidia drivers for oreo

flake.lock

@@ -110,11 +110,11 @@
         "systems": "systems_2"
       },
       "locked": {
-        "lastModified": 1780719019,
+        "lastModified": 1780913839,
-        "narHash": "sha256-DZCJn3xaUSztvxw8xtbRSBxRQRzAoWvzGFAc0NLZdjw=",
+        "narHash": "sha256-SAApjWmx0ckoH/LddeOIDHqlLOwuCbz4ViObvf/N2RE=",
         "owner": "nix-community",
         "repo": "nix4vscode",
-        "rev": "efe7a04bb221089e7ecb0b663441afc2a40eb02d",
+        "rev": "b6f45dca18b3f4ab2f8029bce512cde59f950a89",
         "type": "github"
       },
       "original": {

hosts/oreo/default.nix

@@ -4,6 +4,7 @@
     ../../modules/core.nix
     ../../modules/plasma.nix
     ../../modules/security.nix
+    ../../modules/nvidia.nix
   ];
 
   networking.hostName = "oreo";
@@ -33,5 +34,17 @@
     polkitPolicyOwners = [ "alex" ];
   };
 
+  modules.nvidia = {
+    enable = false;
+    open = true;
+    # Only needed if this is a laptop with hybrid graphics:
+    prime = {
+      enable = true;
+      mode = "offload";
+      intelBusId = "PCI:0:2.0";
+      nvidiaBusId = "PCI:1:0:0";
+    };
+  };
+
   system.stateVersion = "25.11";
 }

modules/core.nix

@@ -16,6 +16,7 @@
     gptfdisk
     exfatprogs
     parted
+    lshw
   ];
 
   nixpkgs.overlays = [ inputs.nix4vscode.overlays.default ];

modules/nvidia.nix

@@ -0,0 +1,104 @@
+{ config, lib, ... }:
+
+{
+  options.modules.nvidia = {
+    enable = lib.mkEnableOption "NVIDIA proprietary drivers";
+
+    open = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = ''
+        Use the open-source NVIDIA kernel module.
+        Set to true for Turing (RTX 20-series) and newer.
+        Set to false for older architectures.
+      '';
+    };
+
+    package = lib.mkOption {
+      type = lib.types.package;
+      default = config.boot.kernelPackages.nvidiaPackages.stable;
+      defaultText = lib.literalExpression
+        "config.boot.kernelPackages.nvidiaPackages.stable";
+      description = "The NVIDIA driver package to use.";
+    };
+
+    prime = {
+      enable = lib.mkEnableOption "NVIDIA Optimus PRIME (hybrid graphics)";
+
+      mode = lib.mkOption {
+        type = lib.types.enum [ "offload" "sync" "reverse-sync" ];
+        default = "offload";
+        description = ''
+          Which PRIME mode to use.
+            offload      — iGPU handles everything; dGPU used on demand (best battery)
+            sync         — dGPU always active; best performance, less tearing
+            reverse-sync — experimental; dGPU primary, iGPU for outputs
+        '';
+      };
+
+      intelBusId = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "PCI:0:2:0";
+        description = "PCI bus ID of the Intel iGPU (from lshw -c display).";
+      };
+
+      amdBusId = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "PCI:54:0:0";
+        description = "PCI bus ID of the AMD iGPU (from lshw -c display). Leave empty if Intel.";
+      };
+
+      nvidiaBusId = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+        example = "PCI:14:0:0";
+        description = "PCI bus ID of the NVIDIA dGPU (from lshw -c display).";
+      };
+    };
+  };
+
+  config = lib.mkIf config.modules.nvidia.enable {
+    hardware.graphics.enable = true;
+
+    services.xserver.videoDrivers =
+      if config.modules.nvidia.prime.enable
+        && config.modules.nvidia.prime.mode == "offload"
+      then [
+        (if config.modules.nvidia.prime.amdBusId != "" then "amdgpu" else "modesetting")
+        "nvidia"
+      ]
+      else [ "nvidia" ];
+
+    hardware.nvidia = {
+      modesetting.enable = true;
+      open = config.modules.nvidia.open;
+      nvidiaSettings = true;
+      package = config.modules.nvidia.package;
+
+      powerManagement.enable = false;
+      powerManagement.finegrained = false;
+
+      prime = lib.mkIf config.modules.nvidia.prime.enable (
+        let
+          busIds = lib.filterAttrs (_: v: v != "") {
+            intelBusId  = config.modules.nvidia.prime.intelBusId;
+            amdgpuBusId = config.modules.nvidia.prime.amdBusId;
+            nvidiaBusId = config.modules.nvidia.prime.nvidiaBusId;
+          };
+          modeConfig =
+            if config.modules.nvidia.prime.mode == "offload" then {
+              offload.enable = true;
+              offload.enableOffloadCmd = true;
+            } else if config.modules.nvidia.prime.mode == "sync" then {
+              sync.enable = true;
+            } else {
+              reverseSync.enable = true;
+              allowExternalGpu = false;
+            };
+        in busIds // modeConfig
+      );
+    };
+  };
+}