[Bug 193083] New: Keyboard input stops working after switching windows

[Johannes Goller]

https://bugs.kde.org/show_bug.cgi?id=193083

           Summary: Keyboard input stops working after switching windows
           Product: kde
           Version: 4.2.2
          Platform: Fedora RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: jogojapan at gmail.com


Version:            (using KDE 4.2.2)
Compiler:          gcc 4.3 
OS:                Linux
Installed from:    Fedora RPMs

Problem: After switching windows using Alt+Tab (but not if the mouse is used to
switch windows), it sometimes, not always, occurs that no keyboard input takes
any effect in the window I switched to, except that I can use Alt+Tab again to
switch to another window.
Most of the time the problem is solved by switching to another window and back
to the target window, using the mouse. Sometimes this does not help either, and
I am forced to entirely shut the window and re-open the application.

I have seen this problem occur with two applications (i.e. if these
applications were the target window I attempted to switch to): Konsole and
Eclipse. I have never seen it occur with Firefox, although I am switching to
that application a lot too.

I have a suspicion that this problem is related to the Anthy Skim Japanese
input method, which is activated on my computer most of the time (and the
problem only occurred when it was activated). To reproduce the bug, it might be
necessary to enable Anthy Skim for Japanese (not necessarily actually switching
to Japanese input, though).

The frequency with which the problem occurs is also related to the type of
window I am in _before_ I switch. If that is  Konsole, the problem _never_
occurs. If it is the Firefox browser, the problem _always_ occurs. If it is
Eclipse, the problem _sometimes_ occurs.

The bug can also be triggered by switching tabs within the Konsole application.
If I open 3 or more tabs in Konsole, and circle a couple of times between them,
using keyboard shortcuts, I usually end up not being able to type into the
windows any more.

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