diff --git a/src/plugins/xscreensaver/xscreensaverbasedpoller.cpp b/src/plugins/xscreensaver/xscreensaverbasedpoller.cpp
--- a/src/plugins/xscreensaver/xscreensaverbasedpoller.cpp
+++ b/src/plugins/xscreensaver/xscreensaverbasedpoller.cpp
@@ -70,6 +70,7 @@
 {
     stopCatchingIdleEvents();
     XResetScreenSaver(QX11Info::display());
+    XFlush(QX11Info::display());
     emit resumingFromIdle();
 }