--- a/jdk/src/solaris/classes/sun/awt/X11/XWindowPeer.java	Wed Apr 24 11:48:54 2013 +0400
+++ b/jdk/src/solaris/classes/sun/awt/X11/XWindowPeer.java	Fri Apr 26 18:48:11 2013 +0400
@@ -1887,7 +1887,9 @@
         switch (getWindowType())
         {
             case NORMAL:
-                typeAtom = protocol.XA_NET_WM_WINDOW_TYPE_NORMAL;
+                typeAtom = (ownerPeer == null) ?
+                               protocol.XA_NET_WM_WINDOW_TYPE_NORMAL :
+                               protocol.XA_NET_WM_WINDOW_TYPE_DIALOG;
                 break;
             case UTILITY:
                 typeAtom = protocol.XA_NET_WM_WINDOW_TYPE_UTILITY;

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/awt/WMSpecificTests/Metacity/FullscreenDialogModality.java	Fri Apr 26 18:48:11 2013 +0400
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8012586
+ * @summary verify that modal dialog will appeared above fullscreen window under Metacity WM.
+ * @run main FullscreenDialogModality
+ * @run main/othervm FullscreenDialogModality
+ * @author vkravets
+ */
+
+import test.java.awt.regtesthelpers.Util;
+
+import java.awt.*;
+import java.lang.reflect.InvocationTargetException;
+
+public class FullscreenDialogModality extends Frame {
+
+    static Robot robot = null;
+
+    public void enterFS() {
+        GraphicsDevice gd = getGraphicsConfiguration().getDevice();
+        final boolean fs = gd.isFullScreenSupported();
+        System.out.println("FullscreenSupported: " + (fs ? "yes" : "no"));
+        gd.setFullScreenWindow(this);
+        try {
+            // Give the system time to set the FS window and display it
+            // properly
+            Thread.sleep(2000);
+        } catch (Exception e) {}
+    }
+
+    public void exitFS() {
+        GraphicsDevice gd = getGraphicsConfiguration().getDevice();
+        // reset window
+        gd.setFullScreenWindow(null);
+        try {
+            // Give the system time to set the FS window and display it
+            // properly
+            Thread.sleep(2000);
+        } catch (Exception e) {}
+    }
+
+    public void checkDialogModality() throws InvocationTargetException, InterruptedException {
+        // Dialog
+        final Dialog d = new Dialog(FullscreenDialogModality.this, "Modal dialog", Dialog.ModalityType.APPLICATION_MODAL);
+        d.setBounds(500, 500, 160, 160);
+        d.setModal(true);
+        d.setBackground(Color.red);
+        EventQueue.invokeLater(new Runnable()
+        {
+            public void run()
+            {
+                d.setVisible(true);
+            }
+        });
+        // Wait until the dialog is shown
+        EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                // Empty
+            }
+        });
+
+        Util.waitForIdle(robot);
+        try {
+            //Check color
+            Point checkPoint = new Point(d.getX() + d.getWidth() / 2, d.getY() + d.getHeight() / 2);
+            Color actual = robot.getPixelColor(checkPoint.x, checkPoint.y);
+            System.out.println("Color = " + actual);
+            if (actual.getRGB() == Color.GREEN.getRGB()) {
+                throw new RuntimeException("Test FAILED: Modal dialog shown below fullscreen window");
+            } else if (actual.getRGB() == Color.RED.getRGB()) {
+                System.out.println("Test PASSED: Modal dialog shown above fullscreen window");
+            } else {
+                System.out.println("pixelColor " +
+                        Integer.toHexString(actual.getRGB()) +
+                        " at coordinates (" + checkPoint.x + ", " + checkPoint.y + ")");
+                throw new RuntimeException("Test FAILED: Unexpected behavior");
+            }
+
+            robot.delay(2000);
+            Util.waitForIdle(robot);
+        } finally {
+            d.dispose();
+        }
+    }
+
+    public static void main(String args[]) throws InvocationTargetException, InterruptedException {
+        if (Util.getWMID() != Util.METACITY_WM) {
+            System.out.println("This test is only useful on Metacity");
+            return;
+        }
+        robot = Util.createRobot();
+        Util.waitForIdle(robot);
+        final FullscreenDialogModality frame = new FullscreenDialogModality();
+        frame.setUndecorated(true);
+        frame.setBackground(Color.green);
+        frame.setSize(500, 500);
+        frame.setVisible(true);
+        try {
+            robot.delay(100);
+            Util.waitForIdle(robot);
+
+            EventQueue.invokeAndWait(new Runnable() {
+                public void run() {
+                    frame.enterFS();
+                }
+            });
+            robot.delay(200);
+            Util.waitForIdle(robot);
+
+            frame.checkDialogModality();
+
+            EventQueue.invokeAndWait(new Runnable() {
+                public void run() {
+                    frame.exitFS();
+                }
+            });
+        } finally {
+            frame.dispose();
+        }
+    }
+}