diff --git a/backends/xrandr/xrandroutput.cpp b/backends/xrandr/xrandroutput.cpp
--- a/backends/xrandr/xrandroutput.cpp
+++ b/backends/xrandr/xrandroutput.cpp
@@ -152,6 +152,7 @@
             qDeleteAll(m_modes);
             m_modes.clear();
             m_preferredModes.clear();
+            m_edid.clear();
         }
     } else if (conn == XCB_RANDR_CONNECTION_CONNECTED) {
         // the output changed in some way, let's update the internal