gnome-terminal does not change window title after returning root account

[Numan Demirdöğen]

If a user change user to root via sudo su command then exit root account by writing exit, gnome-terminal does not change window title or tab name to default one or profile's preferred title.

Steps to produce bug:
1- Open gnome-terminal -> title of the terminal shows user's preferred title like Terminal or user_name@host_name:some_dir_path
2- sudo su -> title or tab name of the terminal changes to root@host_name:some_dir_path
3- Exit root account by exit command
4- Title of the terminal remains root@host_name:some_dir_path

What I expect to happen:
1- Open gnome-terminal -> title of the terminal shows user's preferred title like Terminal or user_name@host_name:some_dir_path
2- sudo su -> title of the terminal changes to root@host_name:some_dir_path
3- Exit root account by exit command
4- Title of the terminal should change to user's preferred title like Terminal or user_name@host_name:some_dir_path

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: gnome-terminal 3.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Nov 2 02:13:52 2014
InstallationDate: Installed on 2014-02-27 (247 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140224)
SourcePackage: gnome-terminal
UpgradeStatus: Upgraded to utopic on 2014-09-08 (54 days ago)

[Numan Demirdöğen (if.gnu.linux)]

The bug can be reproducable on other vte based terminal emulators like Sakura and Guake. Is that mean the bug is related to vte library?

[Numan Demirdöğen (if.gnu.linux)]

It seems that the bug has been fixed on 16.04.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu Xenial Xerus (development branch)

LC_ALL=C apt-cache policy gnome-terminal
gnome-terminal:
  Installed: 3.18.2-1ubuntu2
  Candidate: 3.18.2-1ubuntu2
  Version table:
 *** 3.18.2-1ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

[Numan Demirdöğen (if.gnu.linux)]

Unfortunatelly, the bug still exists in Ubuntu 16.04.1. I do not know what I can do to further investigate the couse of the bug.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"

C_ALL=C apt-cache policy gnome-terminal
gnome-terminal:
  Installed: 3.18.3-1ubuntu1
  Candidate: 3.18.3-1ubuntu1
  Version table:
 *** 3.18.3-1ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

[Numan Demirdöğen (if.gnu.linux)]

The bug still exists in Ubuntu 16.10.

LC_ALL=C lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety

LC_ALL=C apt-cache policy gnome-terminal
gnome-terminal:
  Installed: 3.20.2-1ubuntu5
  Candidate: 3.20.2-1ubuntu5
  Version table:
 *** 3.20.2-1ubuntu5 500
        500 http://archive.ubuntu.com/ubuntu yakkety/main amd64 Packages
        100 /var/lib/dpkg/status

[Numan Demirdöğen (if.gnu.linux)]

I reported this bug to upstream. Here is the link to the bug: https://bugzilla.gnome.org/show_bug.cgi?id=775036

[Numan Demirdöğen (if.gnu.linux)]

It seems that this particular behaviour is caused by something that I made. I will try to compare default configurations and changes that I made in ~/.bashrc, ~/.profile, /etc/bash.bashrc ant /etc/skel.