diff -r 7f6e7753e018 -r e375a7921169 windowing/windowserver/nga/SERVER/openwfc/WINDOW.CPP
--- a/windowing/windowserver/nga/SERVER/openwfc/WINDOW.CPP	Mon Jun 21 17:08:43 2010 +0300
+++ b/windowing/windowserver/nga/SERVER/openwfc/WINDOW.CPP	Thu Jul 15 20:08:02 2010 +0300
@@ -674,6 +674,11 @@
 		aWindowTreeObserver.FlagChanged(*this, MWsWindowTreeObserver::ENonFading, ETrue); 
 		}
 	
+	if(IsTopClientWindow() && (iFlags&EFlagScreenDeviceInvalid) )
+		{
+		aWindowTreeObserver.FlagChanged(*this, MWsWindowTreeObserver::EScreenDeviceValid, EFalse);
+		}
+	
 	if(iAnimList)
 		iAnimList->SendState(aWindowTreeObserver);