You're referring to the X server, which has been administered by text configuration files for the last thirty years. Graphical tools just manipulate it.
The Ubuntu techs have got it so wrong, I will NOT sit in front of a text editor for hours on end fixing their screw ups, if something does not work with microsoft they chuck a few dollars at the prob and issue a patch simple.
Well, did you bother to read about what it was going to do before you hit the button? You probably got caught up in the transition to a new major version of Gnome, but it would have warned you first.
I forgot to tell you lot of the time I ran the updates that Ubuntu said needing installing, the install finished, my server rebooted, I logged in and displayed in front of me was a completely different desktop layout/colour, different Icons, and different start menu, how mad is that, crazy, crazy & weird!! would that happen with Win 3.1 No, Win95 No, Win 2k No, XP No, Vista No, not even Win ME would through a wobbler like that.