[Bug 298979] Strange black window appears after clicking on a lamp icon in tray after upgrading from Kubuntu 11.10 with KDE 4.8.2 to Kubuntu 12.04 with KDE 4.8.2.

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=298979

Christoph Feck <christoph at maxiom.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|kded                        |general
            Version|4.8                         |4.8.2
           Assignee|unassigned-bugs at kde.org     |kwin-bugs-null at kde.org
            Product|kdelibs                     |kwin

--- Comment #3 from Christoph Feck <christoph at maxiom.de> ---
Do you have compositing ("Desktop Effects") enabled? Does disabling them
(Alt+Shift+F12) make any difference? Which video drivers are you using?

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