diff -r 7f6e7753e018 -r e375a7921169 windowing/windowserver/nga/SERVER/openwfc/cliwin.cpp
--- a/windowing/windowserver/nga/SERVER/openwfc/cliwin.cpp	Mon Jun 21 17:08:43 2010 +0300
+++ b/windowing/windowserver/nga/SERVER/openwfc/cliwin.cpp	Thu Jul 15 20:08:02 2010 +0300
@@ -1426,6 +1426,13 @@
 			iFlags&=~EFlagScreenDeviceInvalid;
 		else
 			iFlags|=EFlagScreenDeviceInvalid;
+		
+		MWsWindowTreeObserver* windowTreeObserver = iScreen->WindowTreeObserver();
+		if (windowTreeObserver)
+			{
+			windowTreeObserver->FlagChanged(*this, MWsWindowTreeObserver::EScreenDeviceValid, aState);
+			}
+		
 		return ETrue;
 		}
 	return EFalse;