Increase power saving measures

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;
+
 }