Hi,
I have ran into a strange problem. Last day i switched off my desktop machine, without any problems. Today morning when Kubuntu started up, i clicked on the K menu and nothing happened, but the KDE tray (whole Plasma Desktop) freezed too. Other programs runned fine (restored from previous session, Firefox, terminal window, etc). (Using Kubuntu 12.04 for a half year without any problems.)
I have tried restarting the computer for a several times, but this strange behavior continued.
If i try to run any KDE programs from command line, they doesn't start. I get the "QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave. " message, but afaik it is not related to this error.
On KDE tray, i can click everything, when it isn't frozen, and widgets are working (until i click the K menu )
The error appears with effects turned off, and effects turned on, too.
I have tried to create a test user, and log in with that, the Plasma Desktop is working fine with a new user.
Does anyone know that what can be causing this problem? Any help would be appreciate
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