[Bug 1532] New: Some windows don't get mouse clicks under certain WMs

[bugzilla-daemon at icedtea.classpath.org]

http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=1532

            Bug ID: 1532
           Summary: Some windows don't get mouse clicks under certain WMs
    Classification: Unclassified
           Product: IcedTea
           Version: 2.4.1
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: IcedTea
          Assignee: gnu.andrew at redhat.com
          Reporter: andrey.vihrov at gmail.com
                CC: unassigned at icedtea.classpath.org

I use an application named "TopCoder Arena". The application has a main window
that is never closed and several additional windows. When certain secondary
windows are opened, they don't seem to get mouse click events. Instead, the
mouse clicks "go through" and the main application window, which remains
underneath, receives them. Effectively, the new window's controls can't be used
with the mouse; however, keyboard input still works.

OpenJDK version is:
java version "1.7.0_40"
OpenJDK Runtime Environment (IcedTea 2.4.1) (ArchLinux build
7.u40_2.4.1-3-x86_64)

I have also verified that Oracle's Java, version 7.25, has the same problem.

It appears that this is window manager-related. I have reproduced this issue
with
* xfwm4 4.10.1 (part of Xfce)
* fluxbox 1.3.5
* openbox 3.5.2

In xfwm4, I tried disabling ICCCM and compositing, but it didn't make a
difference. However, the problem disappears with twm 1.0.7. My X.org version is
1.14.2.

Unfortunately, the only way known to me to reproduce the bug is to launch the
said application. It requires a user account, which can be created free of
charge at http://community.topcoder.com/tc .

Steps to reproduce:
* Use one of the window managers mentioned above, except twm
* Go to http://community.topcoder.com/tc and click on the "O(n)" icon, or run
the application directly:
https://community.topcoder.com/contest/arena/ContestAppletProd.jnlp
* Log in to the application
* A main window appears; find and click the "Leader Board" button
* Try to scroll the table or use the dropdown list with the mouse: it doesn't
work

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