Comment 37 for bug 1053910

Thanks, I'm trying it now.
Because the panel doesn't work, I've to go to Settings from the command line:
$ systemsettings

As advised:
"Disable kded4 modules in System Settings > Startup and Shutdown > Service Manager."
I'm going to Startup and Shutdown, everything is fine till that moment.
When clicking on 'Service Manager', the window is freezing for around 1 minute and then I've the error:
"Unable to contact KDED."
Then all the Startup Services are gray/disabled and 'Not running'. So I can't change anything.

So I'm disabling all the services manually by renaming all files to something else:
$ cd /usr/share/kde4/services/kded
$ sudo rename 's/.desktop/.desktop.disabled/' *.desktop
$ kbuildsycoca4