just on Linux: grey rectangles instead of JFrame

From: Tarlika Elisabeth Schmitz (invalid_at_invalid.invalid)
Date: 10/19/04 

Date: Tue, 19 Oct 2004 09:55:27 +0100

Hello,
I have an absolutely desperate Problem, which appears on the Linux
target machines only, NOT on my Windows 2000 test environment.

I am simply looking for hints to track down the problem or for someone
who has seen a similar phenomenon.

System:
- Debian Linux
- BlackDown 1.4.2, or Sun 1.4.2_03
- PC 512MB, 2.8 GHz, nothing else running
- Gnome 2.6
- Windowmanager: Sawfish or Metacity

Application: single-threaded Swing application using JFrames. Some are
just hidden upon close, others are newly created each time.

Test: just open, close, open, close windows

Problem: 20-30% of the time a JFrame is not painted properly
a) just a grey rectangle
b) Window decorations drawn, but content just grey
c) content drawn but no Window Decorations
In all cases the rectangle is the size of what the JFrame would've been
Placing other windows on top and pulling them away does not cause a
repaint. Once the rectangle even appeared on all 4 desktops!!!! I also
noticed that sometimes the rectangle doesn't appear in the taskbar.
The only thing that helps is exit and start again.
I can't see a common denominator so far. It seems to happen to arbitrary
windows.

This does not appear to be caused by uncaught exceptions. The phenomenon
appears without any errors being logged nor anything on the console
(neither stack trace nor out of mem).

I first tried Blackdown 1.4.2. It doesn't take long to hit the problem.
De-installed Blackdown, installed Sun 1.4.2. Took much longer for the
problem to appear. I would like to emphasize again, that I have never
seen this on my Win2K machine with Sun SDK 1.4.2_01. 

-- 
Regards/Gruß,
Tarlika Elisabeth Schmitz

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