--- old/modules/graphics/src/main/java/com/sun/glass/ui/monocle/x11/X11PlatformFactory.java	2014-05-11 18:09:40.000000000 +0300
+++ new/modules/graphics/src/main/java/com/sun/glass/ui/monocle/x11/X11PlatformFactory.java	2014-05-11 18:09:40.000000000 +0300
@@ -28,11 +28,16 @@
 import com.sun.glass.ui.monocle.NativePlatform;
 import com.sun.glass.ui.monocle.NativePlatformFactory;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
 public class X11PlatformFactory extends NativePlatformFactory {
 
     @Override
     protected boolean matches() {
-        return true;
+        String display = AccessController.doPrivileged(
+                (PrivilegedAction<String>) () -> System.getenv("DISPLAY"));
+        return display != null;
     }
 
     @Override