Add 'legacy/dotfiles/' from commit 'e9a44f677d2852fd5856cecc49ecb984efeba66c'

git-subtree-dir: legacy/dotfiles
git-subtree-mainline: 382887df65
git-subtree-split: e9a44f677d

legacy/dotfiles/system/system-mreow.nix

@@ -0,0 +1,60 @@
+{
+  config,
+  pkgs,
+  lib,
+  username,
+  inputs,
+  ...
+}:
+{
+  imports = [
+    ./common.nix
+    ./disk_mreow.nix
+
+    inputs.nixos-hardware.nixosModules.framework-amd-ai-300-series
+  ];
+
+  hardware.framework.laptop13.audioEnhancement.rawDeviceName =
+    lib.mkDefault "alsa_output.pci-0000_c1_00.6.analog-stereo";
+
+  # PST
+  # time.timeZone = lib.mkForce "America/Los_Angeles";
+
+  # weird hack to get swaylock working? idk, if you don't put this here, password entry doesnt work
+  # if I move to another lock screen program, i will have to replace `swaylock`
+  security.pam.services.swaylock = { };
+
+  # Kernel-level power tuning. These are boot-time / module-load-time settings
+  # that power-profiles-daemon (in common.nix) does not manage. ppd handles
+  # governor and EPP at runtime; these cover everything else.
+  boot.kernelParams = [
+    # Disable NMI watchdog. Eliminates periodic perf-counter interrupts
+    # across all cores (~1 W). Kernel softlockup watchdog remains active.
+    "nmi_watchdog=0"
+
+    # Route kernel work items to already-busy CPUs rather than waking idle
+    # ones. Reduces C-state exit frequency -- significant on battery where
+    # cores idle often.
+    "workqueue.power_efficient=1"
+  ];
+
+  boot.kernel.sysctl."kernel.nmi_watchdog" = 0;
+
+  # Power-gate the HDA codec between audio activity. 1-second inactivity
+  # timeout; controller powers down fully. Wakes transparently on next
+  # audio event -- no audible artifacts on Framework 13 AMD.
+  boot.extraModprobeConfig = ''
+    options snd_hda_intel power_save=1 power_save_controller=Y
+  '';
+
+  # Greetd display manager
+  services.greetd = {
+    enable = true;
+    settings = {
+      default_session = {
+        command = "${lib.getExe pkgs.tuigreet} --time";
+        user = username;
+      };
+    };
+  };
+}