Increase power saving measures

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;

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 +28,37 @@
 
   # Prevent overheating of the CPU
   services.thermald.enable = true;
+
+  # Provide power management support to programs
+  services.upower.enable = true;
+
+  # HACK Enable internal microphone when headphones are plugged in and add workaround for frequent WiFi disconnects
+  hardware.firmware = [
+    (pkgs.writeTextDir "/lib/firmware/hda-jack-retask.fw" ''
+      [codec]
+      0x10ec0293 0x17aa2233 0
+
+      [pincfg]
+      0x12 0x90a60130
+      0x13 0x40000000
+      0x14 0x90170110
+      0x15 0x03211040
+      0x16 0x21211010
+      0x18 0x411111f0
+      0x19 0x21a11010
+      0x1a 0x40f000f0
+      0x1b 0x411111f0
+      0x1d 0x40738105
+      0x1e 0x411111f0
+    '')
+  ];
+
+  # Power saving features for multiple devices
+  boot.extraModprobeConfig = ''
+    options snd-hda-intel patch=hda-jack-retask.fw power_save=1
+    options mac80211 beacon_loss_count=500
+    options iwlwifi power_save=1 uapsd_disable=0
+    options iwlmvm power_scheme=3
+  '';
+
 }