gedit 'Gtk-WARNING' after saving changes and closing its GUI window

[αғsнιη]

When I open a file to editing by using 'gksudo gedit /path/to/file' and after saving changes, right after closing its GUI window, stops with this warning.

(gedit:3249): Gtk-WARNING **: Calling Inhibit failed:
GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager
was not provided by any .service files

This warning repeats for each line if I edited. If I change/edit just a single line in opened file then the warning just repeat one time and if I change/edit for example N lines then the warning repeats for N times.

gksu version: gksu version 2.0.x August 2006 GKSU(1)

gedit version: 3.10.4

I'm using Ubuntu 14.04 x64 Desktop and also security upgraded to Ubuntu 14.04.1 .

lsb_release -a

  Distributor ID: Ubuntu
  Description: Ubuntu 14.04.1 LTS
  Release: 14.04
  Codename: trusty

Ubuntu kernel version is : 3.13.0-36-generic and full upgraded.

sudo apt-get upgrade

  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Calculating upgrade... Done
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gedit 3.10.4-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 8 09:32:45 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-10-06 (1 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: gedit
UpgradeStatus: No upgrade log present (probably fresh install)

[αғsнιη (kasiya)]

'(gedit:3249)' is not always the same, each time is different.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.