KDE logoff broke, how do I fix it?

Question

My 'logoff' button stopped working on KDE. I've googled tons, and none of the solutions are working.

If I don't use the official logoff mechanism, on restart, my desktop session state is lost

I can create a new user, and it works for the new user, so I've I've removed my ~/.kde folder, rebuilt my desktop configuration settings (>=4 hrs to do), and at some point the problem has, somehow spontaneously returned. I have a 14.04 LTS install.

Answer 1

I ran:

rm ~/.kde/share/config/ksmserverrc 
sudo reboot now

on reboot, was able to log off again

Thanks to this post on Kubuntu Forums