src/java.desktop/unix/classes/sun/awt/X11/XWM.java

*** 39,48 ****
--- 39,49 ----
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  import sun.util.logging.PlatformLogger;
+ import sun.font.FontUtilities;
  
  
  /**
   * Class incapsulating knowledge about window managers in general
   * Descendants should provide some information about specific window manager.
*** 528,537 ****
--- 529,545 ----
                      XAtom[] curws = XA_DT_WORKSPACE_CURRENT.getAtomListProperty(wmwin);
                      if (curws.length == 0) {
                          return false;
                      }
                      return true;
+                 } else if (FontUtilities.isAIX) {
+                     XQueryTree qt = new XQueryTree(wmwin);
+                     try {
+                         if (qt.execute() > 0) return true;
+                     } finally {
+                         qt.dispose();
+                     }
                  } else {
                      // No DT_WORKSPACE, however in our tests MWM sometimes can be without desktop -
                      // and that is still MWM.  So simply check for the validity of this window
                      // (through WM_STATE property).
                      WindowPropertyGetter state_getter =