From 27f0f105908e73d91f89964b49fa9d7afac4ae1a Mon Sep 17 00:00:00 2001
From: RudolphRiedel <31180093+RudolphRiedel@users.noreply.github.com>
Date: Mon, 20 Apr 2020 14:03:00 +0200
Subject: [PATCH] Ensure brightness > 0 in ExtUI (#17611)

---
 .../lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
index 4e165aa448..325d0c07f2 100644
--- a/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
+++ b/Marlin/src/lcd/extui/lib/ftdi_eve_touch_ui/screens/interface_settings_screen.cpp
@@ -158,6 +158,8 @@ void InterfaceSettingsScreen::onIdle() {
     switch (cmd.track_tag(value)) {
       case 2:
         screen_data.InterfaceSettingsScreen.brightness = float(value) * 128 / 0xFFFF;
+        if (screen_data.InterfaceSettingsScreen.brightness > 1)
+          screen_data.InterfaceSettingsScreen.brightness = 1;
         CLCD::set_brightness(screen_data.InterfaceSettingsScreen.brightness);
         SaveSettingsDialogBox::settingsChanged();
         break;