diff -rupN qt-everywhere-opensource-src-5.0.0-beta1.orig/qt3d/src/threed/viewing/qglview.cpp qt-everywhere-opensource-src-5.0.0-beta1/qt3d/src/threed/viewing/qglview.cpp
--- qt-everywhere-opensource-src-5.0.0-beta1.orig/qt3d/src/threed/viewing/qglview.cpp	2012-08-28 21:41:54.000000000 +0200
+++ qt-everywhere-opensource-src-5.0.0-beta1/qt3d/src/threed/viewing/qglview.cpp	2012-10-28 15:53:36.000000000 +0100
@@ -263,6 +263,8 @@ public:
         delete fbo;
         delete leftSurface;
         delete rightSurface;
+	if(context)
+		delete context;
     }
 
     QGLView *view;
@@ -337,6 +339,11 @@ inline void QGLViewPrivate::ensureContex
 {
     if (!context)
     {
+        view->setSurfaceType(QWindow::OpenGLSurface);
+        view->setFormat(format);
+        if (!view->parent())
+            processStereoOptions(view);
+
         context = new QOpenGLContext();
         context->setFormat(format);
 #ifndef QT_NO_DEBUG_STREAM
@@ -600,6 +607,9 @@ QGLView::QGLView(QWindow *parent)
     // setMouseTracking(true);
     if (!parent)
         d->processStereoOptions(this);
+
+    connect((QWindow*)this,SIGNAL(aboutToBeDestroyed()),this,SLOT(preDestroyContext()),Qt::DirectConnection);
+    connect((QWindow*)this,SIGNAL(destroyed()),this,SLOT(destroyContext()),Qt::DirectConnection);
 }
 
 /*!
@@ -624,6 +634,9 @@ QGLView::QGLView(const QSurfaceFormat& f
     // setMouseTracking(true);
     if (!parent)
         d->processStereoOptions(this);
+
+    connect((QWindow*)this,SIGNAL(aboutToBeDestroyed()),this,SLOT(preDestroyContext()),Qt::DirectConnection);
+    connect((QWindow*)this,SIGNAL(destroyed()),this,SLOT(destroyContext()),Qt::DirectConnection); 
 }
 
 /*!
@@ -634,6 +647,27 @@ QGLView::~QGLView()
     delete d;
 }
 
+void QGLView::preDestroyContext()
+{
+    qDebug("QGLView::preDestroyContext");
+    if(d && d->context)
+        d->context->doneCurrent();
+}
+
+void QGLView::destroyContext()
+{
+    qDebug("QGLView::destroyContext");
+    if(d && d->context)
+    {
+        if(isVisible())
+            setVisible(false);
+	QSurfaceFormat l_format = d->format;
+        delete d;
+	d = new QGLViewPrivate(this);
+        d->format = l_format;
+    }
+}
+
 /*!
     Returns the options for this view.  The default value is
     CameraNavigation.
@@ -836,6 +870,8 @@ void QGLView::exposeEvent(QExposeEvent *
 {
     Q_UNUSED(e);
 
+    if(!surfaceHandle()) return;
+
     d->updateQueued = false;
     d->ensureContext();
     if (!d->initialized)
@@ -849,15 +885,21 @@ void QGLView::exposeEvent(QExposeEvent *
 void QGLView::resizeEvent(QResizeEvent *e)
 {
     Q_UNUSED(e);
+
+    if(!surfaceHandle()) return;
+
     QRect r = geometry();
     Q_ASSERT(e->size() == r.size());
     if (r.size() != d->viewport.size())
     {
-        d->ensureContext();
-        if (!d->initialized)
-            initializeGL();
-        resizeGL(r.width(), r.height());
-        d->viewport = r;
+        if(isVisible())
+	{
+            d->ensureContext();
+            if (!d->initialized)
+                initializeGL();
+            resizeGL(r.width(), r.height());
+            d->viewport = r;
+	}
     }
 }
 
diff -rupN qt-everywhere-opensource-src-5.0.0-beta1.orig/qt3d/src/threed/viewing/qglview.h qt-everywhere-opensource-src-5.0.0-beta1/qt3d/src/threed/viewing/qglview.h
--- qt-everywhere-opensource-src-5.0.0-beta1.orig/qt3d/src/threed/viewing/qglview.h	2012-08-28 21:41:54.000000000 +0200
+++ qt-everywhere-opensource-src-5.0.0-beta1/qt3d/src/threed/viewing/qglview.h	2012-10-28 15:53:36.000000000 +0100
@@ -111,6 +111,10 @@ Q_SIGNALS:
 public Q_SLOTS:
     void update();
 
+protected Q_SLOTS:
+    void preDestroyContext();
+    void destroyContext();
+
 protected:
     void initializeGL();
     void resizeGL(int w, int h);
diff -rupN qt-everywhere-opensource-src-5.0.0-beta1.orig/qtbase/src/gui/kernel/qwindow.cpp qt-everywhere-opensource-src-5.0.0-beta1/qtbase/src/gui/kernel/qwindow.cpp
--- qt-everywhere-opensource-src-5.0.0-beta1.orig/qtbase/src/gui/kernel/qwindow.cpp	2012-08-28 21:40:53.000000000 +0200
+++ qt-everywhere-opensource-src-5.0.0-beta1/qtbase/src/gui/kernel/qwindow.cpp	2012-10-28 15:52:58.000000000 +0100
@@ -1146,6 +1146,9 @@ void QWindow::resize(const QSize &newSiz
 void QWindow::destroy()
 {
     Q_D(QWindow);
+
+    emit aboutToBeDestroyed();
+    
     QObjectList childrenWindows = children();
     for (int i = 0; i < childrenWindows.size(); i++) {
         QObject *object = childrenWindows.at(i);
@@ -1156,11 +1159,16 @@ void QWindow::destroy()
         }
     }
     setVisible(false);
+
     delete d->platformWindow;
+
     d->resizeEventPending = true;
     d->receivedExpose = false;
     d->exposed = false;
     d->platformWindow = 0;
+
+    emit destroyed();
+
 }
 
 /*!
diff -rupN qt-everywhere-opensource-src-5.0.0-beta1.orig/qtbase/src/gui/kernel/qwindow.h qt-everywhere-opensource-src-5.0.0-beta1/qtbase/src/gui/kernel/qwindow.h
--- qt-everywhere-opensource-src-5.0.0-beta1.orig/qtbase/src/gui/kernel/qwindow.h	2012-08-28 21:40:53.000000000 +0200
+++ qt-everywhere-opensource-src-5.0.0-beta1/qtbase/src/gui/kernel/qwindow.h	2012-10-28 15:52:58.000000000 +0100
@@ -284,6 +284,10 @@ Q_SIGNALS:
 
     void focusObjectChanged(QObject *object);
 
+    void destroyed();
+    void aboutToBeDestroyed();
+    
+    
 private Q_SLOTS:
     void screenDestroyed(QObject *screen);
 
@@ -315,9 +319,8 @@ protected:
 
     QWindow(QWindowPrivate &dd, QWindow *parent);
 
-private:
     QPlatformSurface *surfaceHandle() const;
-
+private:
     Q_DISABLE_COPY(QWindow)
 
     friend class QGuiApplication;