[Bug 346021] [NEW] Very slow response to mouse clicks by the KDE desktop.

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Kubuntu 8.10 KDE 4.2.1

Linux qcore 2.6.27-11-generic #1 SMP Thu Jan 29 19:28:32 UTC 2009 x86_64
GNU/Linux

>From time to time KDE responds very slowly to mouse clicks. For
instance, after clicking on a taskbar entry the application takes about
30 seconds to come to the foreground. It is as if the taskbar didn't
notice the click until half a minute later. Other KDE applications have
the same issue. Dolphin, for example, takes a long time to respond to
clicks on its buttons. Non-KDE apps reacts normally to mouse clicks
(within the application, but they are affected by the same lag coming to
the foreground when its taskbar entry is clicked).

It only affects to mouse clicks, the keyboard is as responsive as
always. Another strange thing is that the clock widget on the taskbar is
stuck too: it updates the hour after about half a minute. The taskbar doesn't
reflect changes on the active application immediately either, it can take up to one
minute to highlight the entry of the foreground application or reflect a change on
its title text.

There is nothing sucking CPU or RAM resources, the CPU usage is almost
0% all the time. Once it starts, the issue comes and goes: it works fine
for some clicks but slows down for several minutes thereafter. The only
cure is to logout and restart X, although sometimes a reboot is required.
Then it can take from minutes to days to happen again.

It happened a few times with previous versions of KDE too (4.2.0 and
4.1.x, IIRC).

** Affects: kde4libs (Ubuntu)
     Importance: Undecided
         Status: Invalid

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Very slow response to mouse clicks by the KDE desktop.
https://bugs.edge.launchpad.net/bugs/346021
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