laptop: init (w/ logind lid switch events and auto-cpufreq)

modules/nixos/system/laptop.nix

@@ -0,0 +1,36 @@
+{ config, ... }:
+
+{
+  services.logind = {
+    lidSwitch = "suspend";
+    lidSwitchExternalPower = "lock";
+    lidSwitchDocked = "ignore";
+  };
+
+  services = {
+    tlp.enable = false;
+    power-profiles-daemon.enable = false;
+  };
+
+  services.auto-cpufreq = {
+    enable = true;
+    settings = {
+      battery = {
+        governor = "powersave";
+        energy_performance_preference = "power";
+        platform_profile = "cool";
+        turbo = "never";
+
+        enable_thresholds = true;
+        start_threshold = 50;
+        stop_threshold = 80;
+      };
+      charger = {
+        governor = "performance";
+        energy_performance_preference = "performance";
+        platform_profile = "performance";
+        turbo = "auto";
+      };
+    };
+  };
+}