gulle@gulle-desktop:~$ sudo gedit /usr/share/icons/default/index.theme
[sudo] password for gulle:

** (gedit:10820): WARNING **: Could not load Gedit repository: Typelib file for namespace 'GtkSource', version '3.0' not found

(gedit:10820): IBUS-WARNING **: The owner of /home/gulle/.config/ibus/bus is not root!

(gedit:10820): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files

(gedit:10820): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files