Swing Java 8 Linux Radeon Crash

I'm developing a Swing app on a Linux workstation. When resizing the window of the running app, I get a crash caused by something (I assume the JVM) trying to initialize/load the linux kernel radeon module. I'm not using that module. In fact, I have the radeon module blacklisted because I'm using the native fglrx catalyst driver, which requires nomodeset, and the radeon module doesn't work with nomodeset. Running the app under Java 7, this does not occur.
Nothing special about the app: a JFrame with a toolbar and a JTable.
Any insight/tips/suggestions?
Details:
Java 8 (crashes):
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)
Java 7 (works):
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)
System:
Linux 3.9.10-100.fc17.x86_64 #1 SMP x86_64 GNU/Linux
X.Org X Server 1.12.4
xorg-x11-drv-catalyst 12.10

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Keyboard-lock of swing program on Linux box

We are developing swing program on Linux, and we often meet keyboard-lock issues.
I try to simplify some of them to small programs, and still meet keyboard-lock.
Here I post two programs to show the error:
//---first ----------------------------------------------
package test;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class KeyLock extends JFrame {
JPanel contentPanel = new JPanel();
JPanel wizardToolPan = new JPanel();
JButton btnBack = new JButton("Back");
JButton btnNext = new JButton("Next");
JButton btnAbout = new JButton("About");
public static final String aboutMsg =
 "<html> This program will help to find keyboard lock problems, two way to reproduce: " +
 "1 - press Alt+N to navigate next, and don't release keys untill there are no more next page, " +
 "then try Alt+B to navigate back and also don't release keys untill page 0, " +
 "repeat Alt+N and Alt+B again and again, keyboard will be locked during navigating. " +
 "2 - press Alt+A in main window, it will popup an about dialog, " +
 "then press down space key and don't release, " +
 "the about dialog will be closed and opened again and again, " +
 "keyboard will be locked sooner or later." +
 "</html>";
public KeyLock() {
 this.setDefaultCloseOperation(EXIT_ON_CLOSE);
 this.setTitle("Keyboard lock test");
 getContentPane().setLayout(new BorderLayout());
 btnBack.setMnemonic('B');
 btnBack.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 KeyLock.this.goBack(e);
 btnNext.setMnemonic('N');
 btnNext.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 KeyLock.this.goNext(e);
 btnAbout.setMnemonic('A');
 btnAbout.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 JOptionPane.showMessageDialog(KeyLock.this, aboutMsg, "About", JOptionPane.INFORMATION_MESSAGE);
 contentPanel.setLayout(new BorderLayout());
 contentPanel.setPreferredSize(new Dimension(400, 250));
 contentPanel.setMinimumSize(new Dimension(400, 250));
 wizardToolPan.setLayout(new FlowLayout());
 wizardToolPan.add(btnBack);
 wizardToolPan.add(btnNext);
 wizardToolPan.add(btnAbout);
 this.getContentPane().add(contentPanel, java.awt.BorderLayout.CENTER);
 this.getContentPane().add(wizardToolPan, java.awt.BorderLayout.SOUTH);
 this.setSize(400, 300);
 this.createContentPanels();
 this.showCurrent();
private Vector<JPanel> slides = new Vector<JPanel>();
private int current = 0;
private void createContentPanels() {
 for (int j = 0; j < 20; ++j) {
 JPanel p = new JPanel(new FlowLayout());
 p.add(new JLabel("Page: " + j));
 p.add(new JTextField("Page: " + j + ", input something here", 20));
 p.add(new JTextField("Page: " + j + ", input something here", 20));
 p.add(new JTextField("Page: " + j + ", input something here", 20));
 p.add(new JLabel("Input something in password box:"));
 p.add(new JPasswordField(20));
 p.add(new JCheckBox("Try click here, focus will be here."));
 p.add(new JRadioButton("Try click here, focus will be here."));
 slides.add(p);
public void showCurrent() {
 if (current < 0 || current >= slides.size())
 return;
 JPanel p = slides.get(current);
 this.contentPanel.add(p, java.awt.BorderLayout.CENTER);
 this.pack();
 Component[] comps = p.getComponents();
 if (comps.length > 0) {
 comps[0].requestFocus(); // try delete this line
 this.repaint();
public void goNext(ActionEvent e) {
 if (current + 1 >= slides.size())
 return;
 this.contentPanel.remove(slides.get(current));
 current++;
 sleep(100);
 this.showCurrent();
public void goBack(ActionEvent e) {
 if (current <= 0)
 return;
 this.contentPanel.remove(slides.get(current));
 current--;
 sleep(100);
 this.showCurrent();
public static void sleep(int millis) {
 try {
 Thread.sleep(millis);
 } catch (Exception e) {
 e.printStackTrace();
public static void main(String[] args) {
 KeyLock wizard = new KeyLock();
 wizard.setVisible(true);
}The first program will lead to keyboard-lock in RHEL 4 and red flag 5, both J2SE 5 and 6.
//---second -----------------------------------------
package test;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class KeyFocusLost extends JFrame {
private JButton btnPopup = new JButton();
private JTextField jTextField1 = new JTextField();
private JPasswordField jPasswordField1 = new JPasswordField();
private JPanel jPanel1 = new JPanel();
private JScrollPane jScrollPane3 = new JScrollPane();
private JTree jTree1 = new JTree();
private JButton btnAbout = new JButton("About");
public static final String aboutMsg =
 "<html> This program is used to find keyboard focus lost problem. " +
 "Click 'popup' button in main window, or select any node in the tree and press F6, " +
 "a dialog popup, and click ok button in the dialog, " +
 "keyboard focus will lost in main window." +
 "</html>";
public KeyFocusLost() {
 this.setDefaultCloseOperation(EXIT_ON_CLOSE);
 this.setTitle("Keyboard focus test");
 getContentPane().setLayout(null);
 btnPopup.setBounds(new Rectangle(33, 482, 200, 35));
 btnPopup.setMnemonic('P');
 btnPopup.setText("Popup and lost focus");
 btnPopup.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 PopupDialog dlg = new PopupDialog(KeyFocusLost.this);
 dlg.setVisible(true);
 btnAbout.setBounds(new Rectangle(250, 482, 100, 35));
 btnAbout.setMnemonic('A');
 btnAbout.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 JOptionPane.showMessageDialog(KeyFocusLost.this, aboutMsg, "About", JOptionPane.INFORMATION_MESSAGE);
 jTextField1.setText("Try input here, and try input in password box below");
 jTextField1.setBounds(new Rectangle(14, 44, 319, 29));
 jPasswordField1.setBounds(new Rectangle(14, 96, 319, 29));
 jPanel1.setBounds(new Rectangle(14, 158, 287, 291));
 jPanel1.setLayout(new BorderLayout());
 jPanel1.add(new JLabel("Select any node in the tree and press F6."), java.awt.BorderLayout.NORTH);
 jPanel1.add(jScrollPane3, java.awt.BorderLayout.CENTER);
 jScrollPane3.getViewport().add(jTree1);
 Object actionKey = "popup";
 jTree1.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_F6, 0), actionKey);
 jTree1.getActionMap().put(actionKey, new AbstractAction() {
 public void actionPerformed(ActionEvent e) {
 PopupDialog dlg = new PopupDialog(KeyFocusLost.this);
 dlg.setVisible(true);
 this.getContentPane().add(jTextField1);
 this.getContentPane().add(jPasswordField1);
 this.getContentPane().add(jPanel1);
 this.getContentPane().add(btnPopup);
 this.getContentPane().add(btnAbout);
public static void main(String[] args) {
 KeyFocusLost keytest = new KeyFocusLost();
 keytest.setSize(400, 600);
 keytest.setVisible(true);
static class PopupDialog extends JDialog {
 private JButton btnOk = new JButton();
 public PopupDialog(Frame owner) {
 super(owner, "popup dialog", true);
 setDefaultCloseOperation(DISPOSE_ON_CLOSE);
 this.getContentPane().setLayout(null);
 btnOk.setBounds(new Rectangle(100, 100, 200, 25));
 btnOk.setMnemonic('O');
 btnOk.setText("OK, then focus lost");
 btnOk.addActionListener(new ActionListener() {
 public void actionPerformed(ActionEvent e) {
 PopupDialog.this.getOwner().toFront();
 try {
 Thread.sleep(100); // try delete this line !!!
 } catch (Exception ex) {
 ex.printStackTrace();
 PopupDialog.this.dispose();
 this.getContentPane().add(btnOk);
 this.getRootPane().setDefaultButton(btnOk);
 this.setSize(400, 300);
}The second program will lead to keyboard-focus-lost in RHEL 3/4 and red flag 4/5, J2SE 5, not in J2SE 6.
And I also tried java demo program "SwingSet2" in red flag 5, met keyboard-lock too.
I guess it should be some kind of incompatibleness of J2SE with some Linux platform. Isn't it?
Please help, thanks.

Hi.
I have same problems on Ubuntu with Java 6 (all versions). I would like to use NetBeans or IntelliJ IDEA but it is not possible due to keyboard locks.
I posted this bug
https://bugs.launchpad.net/ubuntu/+bug/174281
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http://forums.java.net/jive/thread.jspa?messageID=189281
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6506617
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6568693
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(I cannot insert link :\ )

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Hi Shay,
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Can I use Gtk components in my java applications?
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Any suggestions, I'm out of ideas and getting no more clues from KDbg/gdb.
I'm in the process of trying out the CVI2010 Linux Runtime Beta, but since CVI2010 no longer supports Windows 2000 I'm slowed down by having had to set up an XP virtual machine (Boy there sure are a lot of patches since my last MSDN XP disk ) and the fact that alien fails to create the 32-bit files on the 64-bit Ubuntu 10.04 I'm currently targeting. I'll have to convert the runtime rpm files on my 32-bit Ubuntu 8.04 system. Not a showstopper but a time-waster so I've had to put it aside for now. I have the 8.0 CVI Linux Runtime apparently working on 64-bit Ubuntu 10.04 so I expect the same procedures should get me going with the 2010 beta once I get alien to make the 32-bit deb files from the rpm files.
Solved!
Go to Solution.

Hassan A wrote:
Hi Wally_666,
I would like to attempt to reproduce this issue to figure out exactly what is going on. If you can provide me with the workspace, project and all necessary source files for your application (preferably in a .zip file) after you ported it to CVI 8.0.1 that would be appreciated.
-Hassan A.
Applications Engineer
National Instruments
I'm happy to see this follow up, but without the networked data source to connect to, my program will just quit with an error message and there will never be a call to the PlotStripChart function if I comment out the exit, as there will be no incoming TCP/IP data.
At one point during development I had a little program that would run on the local system and accept the TCP/IP connection, swallow any commands and fake a reasonable response, while outputting pretend (sawtooth-wave) data on a few channels.
Let me try and recreate it on the 2010 beta runtime and if I can then I will be willing to put some work into trying to let you duplicate it. If importing the Windows CVI 8.0 UIR file into CVI 2010beta fixes the issue when loaded by the Linux Runtime 2010beta its not worth either of our efforts to resolve.
As I said it will be next week at the earliest before I can get back to trying the beta.
Attached is the UIR file from my Windows archive, you might load it into a blank project, run the code generator and then have the timer callback plot some random data. Then you could move the project to Linux and run cvicc and see if it locks up in the PlotStripChart function or not.
I could do UIR edits on Windows and added a few debugging indicators and it always worked when run on Windows and failed when run on Linux after building with cvicc until I deleted the stripchart control and pasted in a version copied from an another variaton of the code. I suspect deleting and re-creating would have worked too, but the stripchart had a lot of color and other attribute tweaks from the defaults, all via the UIR editor long ago.
I suspect there is something corrupt in this UIR file that LoadPanel on Windows fixes or ignores but causes the control to fail (lock up the process) when loaded on Linux.
Using CVI 8.0.1 on an Oracle Virtualbox with the source code on a network share (to the local Linux machine) was very convenient as the Virtualbox NAT let it connect to my networked data source to verify the Windows version worked. The only real hassle was after building on Windows I had to delete the civbuild.* directory before I could run the cvicc command on the shared source directory.
I see some requests for "running the full IDE on Linux", but I think NI could do almost as well with minimal effort by licensing VIrtualbox & and a Windows version to distribute a CVI "appliance VM" of the Windows IDE and appropriate CVI version. Documenting some tips abut using gdb with KDbg or ddd or whatever on the cvicc -debug code would finish the deal. I found KDbg easier to start with for converging on the statement causing the lockup. But while gdb is a pretty big step down from the CVI debugger (which is by far the best I've ever used!) it is more than servicable.
--wally.
Attachments:
stripchart.uir ‏25 KB

Seek help for install java under linux

I have successfully installed java on linux , but not able to use many features tht i possibly could , such as jdbc , prblms on Mysql. most buggin prblm how do i set the compiler path to compile files from my home directory. i have to forcefully use the bin directory and run the complier given long address for the files. plz help.
abhi

abhi
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export JAVA_HOME=<where you installed java>Then do
export PATH=$PATH:$JAVA_HOME/binverify it has worked by simply typing
javaYou can put all of these commands into the .*rc file for your shell, so that they are executed every time you open the shell. So if you are using bash you can put them into ~/.bashrc
Read up setting the PATH and CLASSPATH for more info.
HTH
Matt

Fall into a trouble when calling a dll from java in linux

Hi, experts:
I encountered a big trouble when using JNI to call a C++-compiled DLL from java in Linux: The DLL function didn't execute immediately after the invocation, and was deferred till the end of the Java execution. But all worked well after migrating to windows. This problem made me nearly crazy. Can somebody help me? Thanks in advance.
Linux: fedora core 8, jdk1.6.0_10,
compile options: g++ -fPIC -Wall -c
g++ -shared

It looks like the OP compiled the C source file and linked it into a Windows .dll, which would explain why it worked flawlessly in Windows. (Though I must say the usage of GCC would make someone think it was compiled in Linux for Linux, GCC also exists for Windows, so I'm not sure it's a Windows .dll either...)
@OP: Hello and welcome to the Sun Java forums! This situation requires you to make both a .dll and a .so, for Windows and Linux. You can then refer to the correct library for the operating system using System.loadLibrary("myLibrary"); without any extension.
s
Edited by: Looce on Nov 21, 2008 11:33 AM

Call Windows COM/DCOM objects from Java on Linux

Hello, is it possible to call COM/DCOM objects running on Windows from Java on Linux machine? Thank you.

I don't know anything about it but it looks like EZ JCom in conjunction with the included Remote Access Service does what you're after. It's not free though.
http://www.ezjcom.com/

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