Add suspend-then-hibernate power management for nix-book

machines/john-endesktop/MIGRATION_PLAN.md

@@ -395,8 +395,8 @@ Pre-migration:
 - [ ] NixOS config builds successfully
 
 During migration:
-- [ ] Arch Linux shutdown cleanly
 - [ ] ZFS pools exported
+- [ ] Arch Linux shutdown cleanly
 - [ ] Booted from NixOS USB
 - [ ] nvme0n1p5 formatted with btrfs
 - [ ] Btrfs subvolumes created

machines/nix-book/configuration.nix

@@ -39,6 +39,17 @@
   boot.loader.efi.canTouchEfiVariables = true;
 
   boot.initrd.luks.devices."luks-b614167b-9045-4234-a441-ac6f60a96d81".device = "/dev/disk/by-uuid/b614167b-9045-4234-a441-ac6f60a96d81";
+
+  services.logind.settings.Login = {
+    HandleLidSwitch = "suspend-then-hibernate";
+    HandlePowerKey = "hibernate";
+    HandlePowerKeyLongPress = "poweroff";
+  };
+  systemd.sleep.extraConfig = ''
+    HibernateDelaySec=30m
+    SuspendState=mem
+  '';
+
   networking.hostName = "nix-book"; # Define your hostname.
   # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.