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

@@ -783,11 +783,11 @@
             else {
                 int numItems = helper.getItemCount();
                 numItemsDisplayed = Math.min(MAX_UNFURLED_ITEMS, numItems);
             }
             Point global = XChoicePeer.this.toGlobal(0,0);
-            Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
+            Rectangle screen = graphicsConfig.getBounds();
 
             if (alignUnder != null) {
                 Rectangle choiceRec = XChoicePeer.this.getBounds();
                 choiceRec.setLocation(0, 0);
                 choiceRec = XChoicePeer.this.toGlobal(choiceRec);