system do not recognize if additional monitor is switched off

[Sasa Paporovic]

The system do not recognized as far as the mouse pointer is affected that an external monitor(VGA port) is not longer available, because it is switched off/pluged off.

The mouse pointer is still leaving the main monitor if the border is reached.

Only a additional start of system center -> monitors makes the system recognize that there is no longer an additional monitor is available.

Expected:
--------------

An automatically recognizing of no longer availble monitors with adaption of the mouse area.

Steps to reproduce:
---------------------------

1.Start a Ubuntu system
2.Plug in a additional monitor on VGA port.
3.Use it.
4.Switch off the additional monitor and plug it off.
5.See that the mouse is still able to leave the area of the main monitor
6.Start system settings -> monitors
7.See that the system now resize on program call the mouse area in the limits of the main monitor

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu9
ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
Uname: Linux 3.7.0-7-generic x86_64
ApportVersion: 2.7-0ubuntu2
Architecture: amd64
Date: Wed Dec 26 17:01:17 2012
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2012-07-22 (156 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120722)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no username)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to raring on 2012-11-15 (40 days ago)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu6.1
 deja-dup 25.3-0ubuntu1
 gnome-control-center-signon 0.1.2bzr12.12.05-0ubuntu1
 indicator-datetime 12.10.3daily12.11.23-0ubuntu1

[Launchpad Janitor (janitor)]

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