From e9bcb7bfdfed0f97c0c52fd8212814ce51d53944 Mon Sep 17 00:00:00 2001
From: coolneng <akasroua@gmail.com>
Date: Thu, 19 Jan 2023 12:52:49 +0100
Subject: [PATCH] Increase power saving measures

---
 configuration.nix |  5 ++++-
 modules/power.nix | 11 ++++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/configuration.nix b/configuration.nix
index b133e63..2a3fac5 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -12,9 +12,12 @@ with pkgs;
       "workqueue.power_efficient=y"
       "nohibernate"
       "ipv6.disable=1"
+      "ahci.mobile_lpm_policy=3"
+      "pcie_aspm=force"
+      "nmi_watchdog=0"
     ];
     kernelModules = [ "i915" ];
-    blacklistedKernelModules = [ "btusb" ];
+    blacklistedKernelModules = [ "btusb" "bluetooth" ];
     supportedFilesystems = [ "zfs" ];
     zfs = {
       requestEncryptionCredentials = true;
diff --git a/modules/power.nix b/modules/power.nix
index b6cdce1..2099969 100644
--- a/modules/power.nix
+++ b/modules/power.nix
@@ -12,9 +12,11 @@
     };
   };
 
-  # Suspend when the battery is critical
+  # Suspend when the battery is critical and autosuspend USB and PCI
   services.udev.extraRules = ''
     SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{model_name}=="01AV405", ATTR{capacity}=="[0-5]", RUN+="${config.systemd.package}/bin/systemctl suspend -i"
+    ACTION=="add", SUBSYSTEM=="usb", TEST=="power/control", ATTR{power/control}="auto"
+    ACTION=="add", SUBSYSTEM=="pci", TEST=="power/control", ATTR{power/control}="auto"
   '';
 
   # Undervolt CPU and GPU
@@ -26,4 +28,11 @@
 
   # Prevent overheating of the CPU
   services.thermald.enable = true;
+
+  # Provide power management support to programs
+  services.upower.enable = true;
+
+  # Turn off keyboard backlight when unused
+  services.tp-auto-kbbl.enable = true;
+
 }