diff --git a/backends/xrandr/xrandrconfig.cpp b/backends/xrandr/xrandrconfig.cpp
--- a/backends/xrandr/xrandrconfig.cpp
+++ b/backends/xrandr/xrandrconfig.cpp
@@ -498,6 +498,7 @@
     XRandRCrtc *freeCrtc = Q_NULLPTR;
     qCDebug(KSCREEN_XRANDR) << m_crtcs;
     Q_FOREACH (XRandRCrtc *crtc, m_crtcs) {
+        crtc->update();
         qCDebug(KSCREEN_XRANDR) << "Testing CRTC" << crtc->crtc();
         qCDebug(KSCREEN_XRANDR) << "\tFree:" << crtc->isFree();
         qCDebug(KSCREEN_XRANDR) << "\tMode:" << crtc->mode();
diff --git a/backends/xrandr/xrandrcrtc.cpp b/backends/xrandr/xrandrcrtc.cpp
--- a/backends/xrandr/xrandrcrtc.cpp
+++ b/backends/xrandr/xrandrcrtc.cpp
@@ -66,6 +66,7 @@
 
 bool XRandRCrtc::connectOutput(xcb_randr_output_t output)
 {
+    update();
     qCDebug(KSCREEN_XRANDR) << "Connected output" << output << "to CRTC" << m_crtc;
     if (!m_possibleOutputs.contains(output)) {
         qCDebug(KSCREEN_XRANDR) << "Output" << output << "is not an allowed output for CRTC" << m_crtc;
@@ -80,6 +81,7 @@
 
 void XRandRCrtc::disconectOutput(xcb_randr_output_t output)
 {
+    update();
     qCDebug(KSCREEN_XRANDR) << "Disconnected output" << output << "from CRTC" << m_crtc;
     const int index = m_outputs.indexOf(output);
     if (index > -1) {