This xmonad bug report is probably relevant. Preventing XSetInputFocus to be called on windows with WM_TAKE_FOCUS set seems to fix the issue for me (ion3plus, sun-java-6)

I will run with the change for a while and see if it breaks other apps. (and possible test other java versions)

On Thu, 15 Jan 2009 10:35:49 +0100, Daniel Clemente <> wrote:

Hi, sorry if this message comes twice (I posted yesterday via NNTP without being subscribed to the list).

ion3 is stealing keyboard focus to Swing applications. This happens for instance with Netbeans 6.5:

1. Open netbeans and some other programs in tabs next to it.
2. Select netbeans and open an editor with some code; the cursor is inside the editor
3. Select another tab (either clicking teh tab or with keyboard).
4. Select netbeans again (either clicking the tab or with keyboard).
5. Try to continue typing, but you can't. The cursor is nowhere, and *no key* works (space, cursors, A-S-o, ... all gone). You must click again in the editor and then you can type again.

In fact any Swing application has this problem. You can use this one to test:

--- ----------------------------------------

import javax.swing.JFrame;
import javax.swing.JTextField;

public class TypeInSwing {
  public static void main(String[] args) {
    JFrame frame = new JFrame("HelloWorldSwing");
    final JTextField field = new JTextField("type here");




It happens with latest version 20090110 (with 20080207 too).

I am using:

$ java -version
java version "1.6.0_06"
Java(TM) SE Runtime Environment (build 1.6.0_06-b02)
Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)

  Why is it so?


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