When I try to gedit some files, then I received these from the terminal window. There is already one post about this: Gtk-WARNING : Calling Inhibit failed
But it is not solved. How can I solve it ? 
To solve
IBUS-WARNING **: The owner of /home/myPC/.config/ibus/bus is not root!
use gksudo or gksuinstead of sudo to open the file,
gksudo gedit php.ini
or
gksu gedit php.ini
The next error
(gedit:12512): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
can be solved by updating gir1.2-gtksource-3.0
sudo apt-get install gir1.2-gtksource-3.0
There is another way to not deal with such warnings. Use graphical frontend for sudo/su - gksu (in case of gnome) for running GUI programs as root. Gtk-WARNING : Calling Inhibit failed
When starting an application from the command line, you can avoid verbose output in the terminal after starting the application by using the NOHUP flag before the command and an ampersand following the command.
For example, in this instance you would use:
nohup gedit &
or
nohup gedit
If you need sudo permission, you should use sudo -i instead of sudo to prevent other problems like so:
nohup sudo -i