Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineView.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineView.cpp	(revision 55721)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineView.cpp	(revision 55722)
@@ -577,4 +577,7 @@
         m_pFrameBuffer->setHiDPIOptimizationType(uisession()->hiDPIOptimizationType());
 
+        /* Take scaling optimization type into account: */
+        m_pFrameBuffer->setScalingOptimizationType(gEDataManager->scalingOptimizationType(vboxGlobal().managedVMUuid()));
+
 #ifdef Q_WS_MAC
         /* Take backing scale-factor into account: */