diff --git a/nixos/hosts/trailblazer/default.nix b/nixos/hosts/trailblazer/default.nix
index 5b82165..2c1ed53 100644
--- a/nixos/hosts/trailblazer/default.nix
+++ b/nixos/hosts/trailblazer/default.nix
@@ -34,8 +34,7 @@ let
         openrgb -d "Corsair Lighting Node Pro" -m direct -z 1 -s 100 -b 100 -c $1
   '';
 
-  #mqttServer = "fuuka"
-  mqttServer = "mitsuru";
+  mqttServer = "192.168.50.124";
 
   commandScript = pkgs.writeScriptBin "trailblazer-command-daemon" ''
     #!${pkgs.xonsh}/bin/xonsh
@@ -65,6 +64,16 @@ let
 
         print("[I] Everything should be... well, not-shiny, captain!")
 
+      elif verb == "power/suspend":
+        print("[I] Got a 'sleep' request. Dozing.")
+        ${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m sleep
+        systemctl suspend
+
+      elif verb == "power/off":
+        print("[I] Got a 'power off' request. Will I dream?")
+        ${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m off
+        systemctl suspend
+
       elif verb == "monitors/off":
         print("[I] Got a 'monitors off' request. Adding DPMS nulls.")
 
@@ -137,7 +146,8 @@ let
     print("[I] Trailblazer status service started. Updating every 10s.")
     while True:
       sleep 10
-      mosquitto_pub -h mitsuru -t trailblazer/monitors/status -m $(cat /sys/class/drm/card1-HDMI-A-1/dpms)
+      ${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/monitors/status -m $(cat /sys/class/drm/card1-HDMI-A-1/dpms)
+      ${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m on
   '';
 in
 {
@@ -177,7 +187,7 @@ in
   boot.kernelParams = [
     "iommu=on"
     "amd_iommu=on"
-    #"pcie_acs_override=downstream,multifunction"
+    "xhci_hcd.quirks=270336" # fix random wakeups, maybe?
   ];
 
   # Enable fingerprint reader.
@@ -246,6 +256,8 @@ in
   virtualisation.docker.enable = true;
   users.users.deprekated.extraGroups = [ "docker" ];
 
+  # Fix XHCI suprious wakeups.
+
   #
   # Trailblazer remote service (allows trailblazer things to be controlled via Home Assistant.
   #
@@ -270,6 +282,54 @@ in
     script = "${statusScript}/bin/trailblazer-status-daemon";
   };
 
+  systemd.services.suspend_notify = {
+    description = "trailblazer sleep notifier";
+
+    # Start once we're online.
+    wantedBy = [ "suspend.target" ];
+    wants = [ "network-online.target" ];
+    after = [ "network-online.target" ];
+    before = [ "suspend.target" ];
+
+    script = "${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m sleep";
+  };
+
+  systemd.services.resume_notify = {
+    description = "trailblazer wake notifier";
+
+    # Start once we're online.
+    wantedBy = [ "suspend.target" ];
+    wants = [ "network-online.target" ];
+    after = [ "network-online.target" "suspend.target" ];
+
+    script = "${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m on";
+  };
+
+  systemd.services.poweroff_notify = {
+    description = "trailblazer shutdown notifier";
+
+    # Start once we're online.
+    wantedBy = [ "shutdown.target" ];
+    wants = [ "network-online.target" ];
+    after = [ "network-online.target" ];
+    before = [ "shutdown.target" ];
+
+    script = "${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m shutdown";
+  };
+
+  systemd.services.poweron_notify = {
+    description = "trailblazer wake notifier";
+
+    # Start once we're online.
+    wantedBy = [ "suspend.target" ];
+    wants = [ "network-online.target" ];
+    after = [ "network-online.target" ];
+
+    script = "${pkgs.mosquitto}/bin/mosquitto_pub -h ${mqttServer} -t trailblazer/power/status -m on";
+  };
+
+
+
   #
   # Let trailblazer share its GPS with the house devices.
   #
diff --git a/nixos/packages/default.pkgs.nix b/nixos/packages/default.pkgs.nix
index 621816d..3ff565d 100644
--- a/nixos/packages/default.pkgs.nix
+++ b/nixos/packages/default.pkgs.nix
@@ -56,6 +56,7 @@ with pkgs;
   # Utils.
   _1password-cli
   age
+  age-plugin-yubikey
   agenix.agenix
   atool
   bat