diff --git a/selfdrive/ui/layouts/settings/starpilot/system_settings.py b/selfdrive/ui/layouts/settings/starpilot/system_settings.py
index cbc57fb26..7640fc543 100644
--- a/selfdrive/ui/layouts/settings/starpilot/system_settings.py
+++ b/selfdrive/ui/layouts/settings/starpilot/system_settings.py
@@ -143,13 +143,13 @@ class SystemSettingsManagerView(PanelManagerView):
         "subtitle": tr("Screen brightness while driving."),
         "unit": "%",
         "labels": brightness_labels,
-        "min": 1,
+        "min": 0,
         "max": 101,
         "step": 1,
         "live": True,
-        "presets": [1, 35, 60, 80, 101],
-        "get": lambda: float(max(1, self._controller._params.get_int("ScreenBrightnessOnroad"))),
-        "set": lambda v: self._controller._set_brightness("ScreenBrightnessOnroad", max(1, int(v))),
+        "presets": [0, 35, 60, 80, 101],
+        "get": lambda: float(self._controller._params.get_int("ScreenBrightnessOnroad")),
+        "set": lambda v: self._controller._set_brightness("ScreenBrightnessOnroad", int(v)),
       },
       "ScreenTimeout": {
         "title": tr("Offroad Screen Timeout"),
@@ -917,8 +917,10 @@ class StarPilotSystemLayout(_SettingsPage):
 
   def _set_brightness(self, key, val):
     self._params.put_int(key, int(val))
+    if key == "ScreenBrightnessOnroad" and not ui_state.started:
+      return
     if key in ("ScreenBrightnessOnroad", "ScreenBrightness") and hasattr(HARDWARE, 'set_brightness'):
-        HARDWARE.set_brightness(int(val))
+      HARDWARE.set_brightness(int(val))
 
   def _get_konik_state(self):
     if Path("/data/not_vetted").exists():
diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index 9170c905f..4823e01d1 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -448,7 +448,7 @@ void Device::updateBrightness(const UIState &s, const StarPilotUIState &fs) {
   const StarPilotUIScene &starpilot_scene = fs.starpilot_scene;
   const QJsonObject &starpilot_toggles = starpilot_scene.starpilot_toggles;
   const int screen_brightness_onroad = starpilot_toggles.value("screen_brightness_onroad").toInt();
-  const int clamped_onroad_brightness = std::clamp(screen_brightness_onroad, 1, 100);
+  const int clamped_onroad_brightness = std::clamp(screen_brightness_onroad, 0, 100);
 
   float clipped_brightness = offroad_brightness;
   if (s.scene.started && s.scene.light_sensor >= 0) {
@@ -471,8 +471,6 @@ void Device::updateBrightness(const UIState &s, const StarPilotUIState &fs) {
   } else if (s.scene.started && !starpilot_scene.wake_up_screen && interactive_timeout == 0 && starpilot_toggles.value("standby_mode").toBool()) {
     brightness = 0;
   } else if (s.scene.started && screen_brightness_onroad != 101) {
-    // Guard against stale params that may still contain the old onroad "off"
-    // value. Standby mode is the only supported way to blank the screen onroad.
     brightness = interactive_timeout > 0 ? std::max(5, clamped_onroad_brightness) : clamped_onroad_brightness;
   } else if (starpilot_toggles.value("screen_brightness").toInt() != 101) {
     brightness = starpilot_toggles.value("screen_brightness").toInt();
@@ -490,6 +488,7 @@ void Device::updateWakefulness(const UIState &s, const StarPilotUIState &fs) {
   const StarPilotUIScene &starpilot_scene = fs.starpilot_scene;
   const QJsonObject &starpilot_toggles = starpilot_scene.starpilot_toggles;
   const bool standby_mode = starpilot_toggles.value("standby_mode").toBool();
+  const int screen_brightness_onroad = starpilot_toggles.value("screen_brightness_onroad").toInt();
   const int screen_timeout = starpilot_toggles.value("screen_timeout").toInt();
   const int screen_timeout_onroad = starpilot_toggles.value("screen_timeout_onroad").toInt();
 
@@ -499,7 +498,7 @@ void Device::updateWakefulness(const UIState &s, const StarPilotUIState &fs) {
   // Standby mode should extend the current wake window for alerts and status
   // changes, but it must not clear the timer every frame or manual wakes will
   // collapse immediately.
-  if (ignition_on && standby_mode && starpilot_scene.wake_up_screen) {
+  if (ignition_on && standby_mode && screen_brightness_onroad != 0 && starpilot_scene.wake_up_screen) {
     resetInteractiveTimeout(screen_timeout, screen_timeout_onroad);
   }