Comment 19 for bug 1228567

Not sure that this is fixed. I had the very same problem today and I am using ubuntu 15.10 desktop.

After my wife tried to login an xOrg error was reported. After that my unity desktop refused to load showing only the background image. I have finally got it back running by renaming my ~/.config/dconf/user and subsequently loose my desktop settings.

I think this is a very serious issue especially for I was not doing any updates or driver changes before this error occured, it simply happend out of the blue which is quite frightening.

Hopefully someone will find time to look into this.