System: enable power management via auto-cpufreq

flake.lock

@@ -1,5 +1,25 @@
 {
   "nodes": {
+    "auto-cpufreq": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1730737631,
+        "narHash": "sha256-YsAImsJDFpkW+z45/rj/vceZ8C48gv9RUpnakpc+q5c=",
+        "owner": "AdnanHodzic",
+        "repo": "auto-cpufreq",
+        "rev": "18a3a93f62f2572bc8ed8e953d09dca4a87da9bc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "AdnanHodzic",
+        "repo": "auto-cpufreq",
+        "type": "github"
+      }
+    },
     "crane": {
       "inputs": {
         "nixpkgs": [
@@ -355,6 +375,7 @@
     },
     "root": {
       "inputs": {
+        "auto-cpufreq": "auto-cpufreq",
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",
         "lib": "lib",

flake.nix

@@ -35,10 +35,17 @@
 
     # NixOS hardware quirks
     nixos-hardware.url = "github:NixOS/nixos-hardware/master";
+
+    # Power management via auto-cpufreq
+    auto-cpufreq = {
+      url = "github:AdnanHodzic/auto-cpufreq";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
     inputs@{
+      auto-cpufreq,
       home-manager,
       lanzaboote,
       lix-module,
@@ -58,6 +65,7 @@
       # Define shared modules and imports
       defaultModules = [
         ./modules/autoimport.nix
+        auto-cpufreq.nixosModules.default
         lix-module.nixosModules.default
         lanzaboote.nixosModules.lanzaboote
         nix-flatpak.nixosModules.nix-flatpak

hosts/Khanda/default.nix

@@ -41,6 +41,8 @@ in
     # Enable GPU support.
     gpu.intel.enable = true;
 
+    powerManagement.enable = true;
+
     # Enable support for primary RAID array (just in case)
     raid.storage.enable = true;
 

hosts/Shura/default.nix

@@ -53,6 +53,8 @@ in
     # Keep old generations for two weeks.
     retentionPeriod = "14d";
 
+    powerManagement.enable = true;
+
     services = {
       # Run daily automatic updates.
       autoUpgrade = {

modules/system/system.nix

@@ -37,12 +37,18 @@ in
           xz.bin
         ];
       };
+
+      powerManagement.enable = lib.mkEnableOption "Enables power management, e.g. for laptops.";
     };
   };
   config = {
     # Install base packages
     environment.systemPackages = cfg.corePackages ++ cfg.packages;
 
+    # Configure power management via auto-cpufreq
+    # https://github.com/AdnanHodzic/auto-cpufreq
+    programs.auto-cpufreq.enable = cfg.powerManagement.enable;
+
     services = {
       # Automatically set the timezone based on location
       automatic-timezoned.enable = true;