Desktop Does Not Start Up

[Richard Ibbotson]

Hi

I did a dnf update on my F23 workstation. After rebooting to make sure 
that  the updates were working properly I find that I can't get to the 
login screen.  I see the blue Fedora logo for a split second.  Then 
the command line appears with a message to do Ctrl-D or login as root. 
Nouveau drivers for the graphics card.  I can login as root and use a 
text editor.  After the failed X startup  I can  see the following 
error message on the screen

Error getting authority: Error initialization authority: Could not 
connect: No such file or directory (g-io-error-quark, 1)

If I have a look at the log in /home/user/.local/share/xorg it says...

Fatal server error: xf86OpenConsole: Cannot open virtual console 1 
(Permission 
denied.

If I try startx as as a user or as root I can see.. for example... in 
/var/log/Xorg.0.log...

dbus core: error connecting to system bus: 
org.freedesktop.Dbus.Error.FileNotFound (Failed to connect to socket 
/run/dbus/system_bus_socket: No such file or directory)

Can anyone suggest how to fix this ? I can't send in lengthy logs due 
to the fact that I can't ssh into the machine or run a second or third 
console. Access to one console only. 

-- 
Richard
Sheffield UK