I've got a problem with Nautilus in Ubuntu 12.04 LTS.
When I run the command
gksu nautilus /, the password ask box appears and I type my super-user password, then the password box disappears and Nautilus is not opened.
When I try to open Nautilus as a normal user in with the command
nautilus, the folder is opened.
When I try in terminal
$ sudo nautilus
I got the following error
$ sudo nautilus / ** (nautilus:8523): WARNING **: Command line `dbus-launch --autolaunch=2c8ce9b7da2257c2609b749700000007 --binary-syntax --close-stderr' exited with non-zero exit status 1: Autolaunch error: X11 initialization failed.\n Could not parse arguments: Cannot open display:
How can I fix this error?