Bug#727686: gnome-control-center display : background image not centered disconnecting external monitor

[M_M]

Package: gnome-control-center
Version: 1:3.4.3.1-5+b3
Severity: minor

3.10-3-amd64 #1 SMP Debian 3.10.11-1 (2013-09-10) x86_64 GNU/Linux

I have an external monitor connected to my notebook (not duplicated).
When I disconnect this external monitor, the background image on the notebook
desktop  is not centered, as you can see here:
http://i.imgur.com/O6ge12A.png?1

change image, gnome-shell --replace, exit session, can not resolve this little
problem.



-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 3.10-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnome-control-center depends on:
ii  accountsservice             0.6.34-2
ii  apg                         2.2.3.dfsg.1-2
ii  desktop-file-utils          0.22-1
ii  gnome-control-center-data   1:3.4.3.1-5
ii  gnome-desktop3-data         3.4.2-2
ii  gnome-icon-theme            3.8.3-1
ii  gnome-icon-theme-symbolic   3.8.2.2-2
ii  gnome-menus                 3.8.0-2
ii  gnome-settings-daemon       3.4.2+git20121218.7c1322-6+b2
ii  gsettings-desktop-schemas   3.4.2-3
ii  libatk1.0-0                 2.10.0-2
ii  libc6                       2.17-93
ii  libcairo-gobject2           1.12.16-2
ii  libcairo2                   1.12.16-2
ii  libcanberra-gtk3-0          0.30-2
ii  libcanberra0                0.30-2
ii  libcheese-gtk23             3.8.3-1
ii  libcheese7                  3.8.3-1
ii  libclutter-1.0-0            1.14.4-3
ii  libcogl-pango12             1.14.0-3
ii  libcogl12                   1.14.0-3
ii  libcolord1                  1.0.2-1
ii  libcomerr2                  1.42.8-1
ii  libcups2                    1.6.3-1
ii  libdbus-1-3                 1.6.16-1
ii  libdbus-glib-1-2            0.100.2-1
ii  libegl1-mesa [libegl1-x11]  9.1.7-1
ii  libfontconfig1              2.10.2-2
ii  libgcrypt11                 1.5.3-2
ii  libgdk-pixbuf2.0-0          2.28.2-1
ii  libglib2.0-0                2.36.4-1
ii  libgnome-bluetooth11        3.8.1-2
ii  libgnome-desktop-3-2        3.4.2-2
ii  libgnome-menu-3-0           3.8.0-2
ii  libgnomekbd8                3.6.0-1
ii  libgnutls26                 2.12.23-8
ii  libgoa-1.0-0                3.8.3-2
ii  libgssapi-krb5-2            1.11.3+dfsg-3
ii  libgstreamer0.10-0          0.10.36-1.2
ii  libgtk-3-0                  3.8.4-1
ii  libgtop2-7                  2.28.5-2
ii  libjson-glib-1.0-0          0.16.2-1
ii  libk5crypto3                1.11.3+dfsg-3
ii  libkrb5-3                   1.11.3+dfsg-3
ii  libnm-glib4                 0.9.8.0-5
ii  libnm-gtk0                  0.9.8.4-1
ii  libnm-util2                 0.9.8.0-5
ii  libnotify4                  0.7.6-1
ii  libpango-1.0-0              1.32.5-5+b1
ii  libpangocairo-1.0-0         1.32.5-5+b1
ii  libpolkit-gobject-1-0       0.105-4
ii  libpulse-mainloop-glib0     4.0-6+b1
ii  libpulse0                   4.0-6+b1
ii  libsocialweb-client2        0.25.20-6
ii  libupower-glib1             0.9.22-1
ii  libwacom2                   0.8-1
ii  libx11-6                    2:1.6.2-1
ii  libxcomposite1              1:0.4.4-1
ii  libxdamage1                 1:1.1.4-1
ii  libxext6                    2:1.3.2-1
ii  libxfixes3                  1:5.0.1-1
ii  libxi6                      2:1.7.2-1
ii  libxklavier16               5.2.1-1
ii  libxml2                     2.9.1+dfsg1-3
ii  libxrandr2                  2:1.4.1-1
ii  zlib1g                      1:1.2.8.dfsg-1

Versions of packages gnome-control-center recommends:
pn  cups-pk-helper         <none>
ii  gnome-online-accounts  3.8.3-2
ii  gnome-session          3.4.2.1-4
ii  gnome-user-guide       3.8.2-1
ii  iso-codes              3.47-1
pn  mesa-utils             <none>
ii  mousetweaks            3.8.0-1
ii  policykit-1-gnome      0.105-2

Versions of packages gnome-control-center suggests:
ii  gnome-screensaver         3.4.1-1+b1
ii  gstreamer0.10-pulseaudio  0.10.31-3+nmu1
pn  libcanberra-gtk-module    <none>
ii  x11-xserver-utils         7.7+1

-- no debconf information