From 750689b0f6e0f6bca5875339735f0172820a6607 Mon Sep 17 00:00:00 2001
From: Aleksandr Lebedev <alex.lebedev2003@icloud.com>
Date: Sat, 27 Sep 2025 01:20:34 +0200
Subject: [PATCH] stargate powersavings

---
 systems/x86_64-linux/stargate/powersave.nix | 24 +++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 systems/x86_64-linux/stargate/powersave.nix

diff --git a/systems/x86_64-linux/stargate/powersave.nix b/systems/x86_64-linux/stargate/powersave.nix
new file mode 100644
index 0000000..a4e7b90
--- /dev/null
+++ b/systems/x86_64-linux/stargate/powersave.nix
@@ -0,0 +1,24 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}: {
+  powerManagement.powertop.enable = true;
+  environment.systemPackages = with pkgs; [
+    powertop
+  ];
+  services.udev.extraRules = let
+    mkRule = as: lib.concatStringsSep ", " as;
+    mkRules = rs: lib.concatStringsSep "\n" rs;
+  in
+    mkRules [
+      (mkRule [
+        ''ACTION=="add|change"''
+        ''SUBSYSTEM=="block"''
+        ''KERNEL=="sd[a-z]"''
+        ''ATTR{queue/rotational}=="1"''
+        ''RUN+="${pkgs.hdparm}/bin/hdparm -B 90 -S ${builtins.toString (30 * 60 / 5)} /dev/%k"''
+      ])
+    ];
+}