diff --git a/src/gui/kernel/qwindowsysteminterface.cpp b/src/gui/kernel/qwindowsysteminterface.cpp
index 49ff8bc..41824e2 100644
--- a/src/gui/kernel/qwindowsysteminterface.cpp
+++ b/src/gui/kernel/qwindowsysteminterface.cpp
@@ -114,6 +114,7 @@ void QWindowSystemInterface::handleEnterLeaveEvent(QWindow *enter, QWindow *leav
 
 void QWindowSystemInterface::handleWindowActivated(QWindow *tlw, Qt::FocusReason r)
 {
+    qDebug() << __FUNCTION__ << tlw << r;
     QWindowSystemInterfacePrivate::ActivatedWindowEvent *e =
         new QWindowSystemInterfacePrivate::ActivatedWindowEvent(tlw, r);
     QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
@@ -121,6 +122,7 @@ void QWindowSystemInterface::handleWindowActivated(QWindow *tlw, Qt::FocusReason
 
 void QWindowSystemInterface::handleWindowStateChanged(QWindow *tlw, Qt::WindowState newState)
 {
+    qDebug() << __FUNCTION__ << tlw << newState;
     QWindowSystemInterfacePrivate::WindowStateChangedEvent *e =
         new QWindowSystemInterfacePrivate::WindowStateChangedEvent(tlw, newState);
     QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
@@ -135,6 +137,7 @@ void QWindowSystemInterface::handleWindowScreenChanged(QWindow *tlw, QScreen *sc
 
 void QWindowSystemInterface::handleApplicationStateChanged(Qt::ApplicationState newState)
 {
+    qDebug() << __FUNCTION__ << newState;
     Q_ASSERT(QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState));
     QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *e =
         new QWindowSystemInterfacePrivate::ApplicationStateChangedEvent(newState);
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index 08f3ab4..f955196 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -1024,6 +1024,7 @@ void QWindowsContext::handleFocusEvent(QtWindows::WindowsEventType et,
     }
     if (nextActiveWindow != d->m_lastActiveWindow) {
          d->m_lastActiveWindow = nextActiveWindow;
+         qDebug() << __FUNCTION__ << nextActiveWindow;
          QWindowSystemInterface::handleWindowActivated(nextActiveWindow);
     }
 }
diff --git a/src/plugins/platforms/xcb/qxcbwindow.cpp b/src/plugins/platforms/xcb/qxcbwindow.cpp
index d010698..f2b3d41 100644
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -1869,6 +1869,7 @@ void QXcbWindow::handleFocusInEvent(const xcb_focus_in_event_t *)
     QWindow *w = window();
     w = static_cast<QWindowPrivate *>(QObjectPrivate::get(w))->eventReceiver();
     connection()->setFocusWindow(static_cast<QXcbWindow *>(w->handle()));
+    qDebug() << "XCB" << __FUNCTION__ << w;
     QWindowSystemInterface::handleWindowActivated(w, Qt::ActiveWindowFocusReason);
 }
 
@@ -1876,6 +1877,7 @@ static bool focusInPeeker(QXcbConnection *connection, xcb_generic_event_t *event
 {
     if (!event) {
         // FocusIn event is not in the queue, proceed with FocusOut normally.
+        qDebug() << "XCB" << __FUNCTION__ ;
         QWindowSystemInterface::handleWindowActivated(0, Qt::ActiveWindowFocusReason);
         return true;
     }
@@ -1900,6 +1902,7 @@ void QXcbWindow::handleFocusOutEvent(const xcb_focus_out_event_t *)
     // Do not set the active window to 0 if there is a FocusIn coming.
     // There is however no equivalent for XPutBackEvent so register a
     // callback for QXcbConnection instead.
+    qDebug() << "XCB" << __FUNCTION__ << window();
     connection()->addPeekFunc(focusInPeeker);
 }