I am re-installing Zorin because the set of installed software has too many conflicts to easily resolve.  So it will be down temporarily while this is performed.  I am trying to fix the graphical environment on all servers, most work but some don’t and Zorin was one of those that didn’t.  Having multiple greeters, multiple window managers, seems to be a source of the problems.  Also not all greeters work properly with vnc, rdp or x2go.