Save more power via TLP

modules/power.nix

@@ -5,7 +5,27 @@
   services.auto-cpufreq.enable = true;
 
   # Enable the TLP daemon
-  services.tlp.enable = true;
+  services.tlp = {
+    enable = true;
+    settings = {
+      # Enable audio power saving for Intel HDA, AC97 devices (timeout in secs).
+      # A value of 0 disables, >=1 enables power saving (recommended: 1).
+      # Default: 0 (AC), 1 (BAT)
+      SOUND_POWER_SAVE_ON_AC = 0;
+      SOUND_POWER_SAVE_ON_BAT = 1;
+
+      # Runtime Power Management for PCI(e) bus devices: on=disable, auto=enable.
+      # Default: on (AC), auto (BAT)
+      RUNTIME_PM_ON_AC = "on";
+      RUNTIME_PM_ON_BAT = "auto";
+
+      # Battery feature drivers: 0=disable, 1=enable
+      # Default: 1 (all)
+      NATACPI_ENABLE = 1;
+      TPACPI_ENABLE = 1;
+      TPSMAPI_ENABLE = 1;
+    };
+  };
 
   # Suspend when the battery is critical
   services.udev.extraRules = ''