diff --git a/kcm/kcm.cpp b/kcm/kcm.cpp
--- a/kcm/kcm.cpp
+++ b/kcm/kcm.cpp
@@ -265,6 +265,13 @@
     }
     fetchGlobalScale();
 
+    // Don't pull away the outputModel under QML's feet
+    // signal its disappearance first before replacing it
+    auto *oldConfig = m_config.release();
+    if (oldConfig) {
+        emit outputModelChanged();
+    }
+
     m_config.reset(new ConfigHandler(this));
     Q_EMIT perOutputScalingChanged();
     connect (m_config.get(), &ConfigHandler::outputModelChanged,