Maybe it helps others:
in fustration I changed to tty1 Ctrl +Alt F1
then:
<code>
$ sudo stop kdm
$ rm -rf ~/.kde ~/.kderc /var/tmp/kdecache-<MY USERNAME>
$ sudo start kdm
</code>
I lost all my customizaitons (~2 days of work), but at least now KDE is working again. The error:
<code>
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
</code>
remains though...
Maybe it helps others: kdecache- <MY USERNAME>
in fustration I changed to tty1 Ctrl +Alt F1
then:
<code>
$ sudo stop kdm
$ rm -rf ~/.kde ~/.kderc /var/tmp/
$ sudo start kdm
</code>
I lost all my customizaitons (~2 days of work), but at least now KDE is working again. The error:
<code>
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
</code>
remains though...