Help! Swing freezes

Hello,
I developed several applications using Java V1.4.0. All apps were running at its best. Now I switched over to Java V1.4.1 and all Apps using Swing components (especially JList, JButton, JTextArea, ...) are freezing now.
In Detail: I have an App which I use to administrate a database. I use the CardLayout to switch between the login panel and all other panels. When I start the app the login panel is shown. I enter the login data and hit the login button. Now there are many ways that can happen:
Way 1: the button freezes but the app is still alive (the background threads which don't use Swing are still alice)
Way 2: I have some processing but when the app wants to switch to the other panel Swing freezes (again, all background threads are still alive).
The best thing is the server app I wrote. I can start the server but then immediately (OK, when I want to write some debug data to a JTextArea) Swing is freezing. Now I connect to the server app via some client apps and they are working perfect.
I tried to debug the apps a little bit. Anytime Swing freezes the call stack shows that javax.swing.RepaintManager.addDirtyRegion is the last thing that executes something (or is still executing? forever??). Does Sun has changed something in that class?
I use Linux (SuSE 8.0), Athlon TB 1.1G, Geforce 2 MX. Does it happen to anyone else?
Best regards
DirkBW

Hi!
I have the same problem. It seems that this happens if you instanciate a JComponent in the EventDispatchThread. Try to generate your Swing-Components in a seperate Thread and it will work fine. I think there's a another monitor-lock on the Repaint-Manager in the EventDispatchThread. So if you go into the addDirtyRegions - Method the JVM blocks the EventDispatchThread until the monitor-lock is released. But the EventDispatchThread is the only one who can release this lock -> deadlock. Your Applicaton is working fine after that, only Swing has locked itself. :-(
But it's not very easy to build all JComponents in a seperate Thread. I think it's a serious problem. Maybe bug-report-worthy?
Steve

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