power settings, palette cleanup

1 files changed, 36 insertions, 4 deletions

diff --git a/machines/magician/configuration.nix b/machines/magician/configuration.nix
index 6f085c5..e11434a 100644
--- a/machines/magician/configuration.nix
+++ b/machines/magician/configuration.nix
@@ -17,6 +17,31 @@
     settings = {
       CPU_SCALING_GOVERNOR_ON_AC = "performance";
       CPU_SCALING_GOVERNOR_ON_BAT = "powersave";
+
+      # intel_pstate runs in active mode, where the scaling governor barely
+      # matters. EPP is the knob that actually moves power.
+      CPU_ENERGY_PERF_POLICY_ON_AC = "balance_performance";
+      CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
+
+      # drives the EC's PL1/PL2 power limits
+      PLATFORM_PROFILE_ON_AC = "balanced";
+      PLATFORM_PROFILE_ON_BAT = "low-power";
+
+      # no turbo on battery, and cap sustained clocks. costs real
+      # performance (nix builds especially) to buy runtime.
+      CPU_BOOST_ON_BAT = 0;
+      CPU_HWP_DYN_BOOST_ON_BAT = 0;
+      CPU_MAX_PERF_ON_BAT = 60;
+
+      PCIE_ASPM_ON_BAT = "powersave";
+      RUNTIME_PM_ON_BAT = "auto";
+      WIFI_PWR_ON_BAT = "on";
+      SOUND_POWER_SAVE_ON_BAT = 1;
+      USB_AUTOSUSPEND = 1;
+
+      # battery longevity, not runtime. stops charging at 85%.
+      START_CHARGE_THRESH_BAT0 = 75;
+      STOP_CHARGE_THRESH_BAT0 = 85;
     };
   };
 
@@ -31,6 +56,11 @@
   hardware.graphics.enable = true;
   services.xserver.videoDrivers = [ "modesetting" ];
 
+  # eDP-1 reports vrr_capable. Only helps fullscreen apps flipping via Present.
+  services.xserver.deviceSection = ''
+    Option "VariableRefresh" "true"
+  '';
+
   environment.variables = {
     "MOZ_USE_XINPUT2" = "1";
   };
@@ -45,10 +75,12 @@
  
   services.libinput = {
     enable = true;
-    mouse.tapping = false;
-    # No bottom-right corner right-click; use two-finger click instead.
-    touchpad.clickMethod = "clickfinger";
-    touchpad.naturalScrolling = true;
+
+    touchpad = {
+      tapping = false;
+      clickMethod = "clickfinger"; # no right click corner
+      naturalScrolling = true;
+    };
   };
 
   # This option defines the first version of NixOS you have installed on this particular machine,