Unable to save IP settings

seed@home:~$ gnome-control-center display

(gnome-control-center:4803): network-cc-panel-WARNING **: 19:49:51.853: Failed to commit changes: Insufficient privileges
^C
seed@home:~$ sudo gnome-control-center display
No protocol specified
Unable to init server: Could not connect: Connection refused

(gnome-control-center:4850): Gtk-CRITICAL **: 19:50:19.569: gtk_style_context_add_provider_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
No protocol specified
Unable to init server: Could not connect: Connection refused

(gnome-control-center:4850): Gtk-WARNING **: 19:50:19.572: cannot open display: :10.0