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 log 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