diff --git a/BUILD/libkscreen-5.11.4/backends/xrandr/xrandr.cpp b/BUILD/libkscreen-5.11.4/backends/xrandr/xrandr.cpp
--- a/BUILD/libkscreen-5.11.4/backends/xrandr/xrandr.cpp
+++ b/BUILD/libkscreen-5.11.4/backends/xrandr/xrandr.cpp
@@ -159,7 +159,8 @@
             // info is valid: fall-through
         }
         case false: {
-            xOutput->update(crtc, mode, connection, (primary->output == output));
+            if (connection == XCB_RANDR_CONNECTION_CONNECTED)
+                xOutput->update(crtc, mode, connection, (primary->output == output));
             qCDebug(KSCREEN_XRANDR) << "Output" << xOutput->id() << ": connected =" << xOutput->isConnected() << ", enabled =" << xOutput->isEnabled();
             break;
         }