Bug#700376: [gnome-shell] No wallpaper and gnome-shell focus flickering on dual monitor configuration

[Francisco José Rodríguez Bogado]

Package: gnome-shell
Version: 3.4.2-7
Severity: important

gnome-shell doesn't show my wallpaper on dual monitor. It appears that a 
blue "layer" is over the wallpaper and my desktop. I can interact 
blindly with desktop icons (for instance, secondary clic show the 
correct options: new folder, change wallpaper, etc.).

Furthermore, focus on overview mode flickers and option under cursor 
enlights on and off while the mouse is moving over.

My card is an ATI Radeon X300. Non-free firmware installed (without it, 
I can't use extended desktop on both monitors)


--- System information. ---
Architecture: amd64
Kernel: Linux 3.2.0-4-amd64

Debian Release: 7.0
500 unstable ftp.es.debian.org

--- Package information. ---
Depends (Version) | Installed
=====================================================-+-====================== 

gir1.2-atk-1.0 | 2.4.0-2
gir1.2-clutter-1.0 (>= 1.9.16) | 1.10.8-2
gir1.2-cogl-1.0 | 1.10.2-6
gir1.2-coglpango-1.0 | 1.10.2-6
gir1.2-folks-0.6 | 0.6.9-1+b1
gir1.2-freedesktop | 1.32.1-1
gir1.2-gdesktopenums-3.0 | 3.4.2-3
gir1.2-gdkpixbuf-2.0 | 2.26.1-1
gir1.2-gee-1.0 | 0.6.4-2
gir1.2-glib-2.0 (>= 1.31) | 1.32.1-1
gir1.2-gmenu-3.0 | 3.4.2-7
gir1.2-gtk-3.0 | 3.4.2-6
gir1.2-json-1.0 | 0.14.2-1
gir1.2-mutter-3.0 (>= 3.4.1) | 3.4.1-5
gir1.2-networkmanager-1.0 | 0.9.4.0-10
gir1.2-pango-1.0 | 1.30.0-1
gir1.2-soup-2.4 | 2.38.1-2
gir1.2-telepathyglib-0.12 | 0.18.2-2
gir1.2-telepathylogger-0.2 | 0.4.0-1
dconf-gsettings-backend | 0.12.1-3
OR gsettings-backend |
gconf-service | 3.2.5-1+build1
gnome-bluetooth (>= 3.0.0) | 3.4.2-1
libatk1.0-0 (>= 1.12.4) | 2.4.0-2
libc6 (>= 2.7) |
libcairo-gobject2 (>= 1.10.0) |
libcairo2 (>= 1.10.0) |
libcanberra0 (>= 0.2) |
libclutter-1.0-0 (>= 1.10.0) |
libcogl-pango0 (>= 1.7.4) |
libcogl9 (>= 1.7.4) |
libcroco3 (>= 0.6.2) |
libdbus-1-3 (>= 1.0.2) |
libdbus-glib-1-2 (>= 0.78) |
libebook-1.2-13 (>= 3.4.4) |
libecal-1.2-11 (>= 3.4.4) |
libedataserver-1.2-16 (>= 3.4.4) |
libedataserverui-3.0-1 (>= 3.4.4) |
libffi5 (>= 3.0.4) |
libfolks25 (>= 0.6.0) |
libgck-1-0 (>= 2.91.1) |
libgconf-2-4 (>= 2.31.1) |
libgcr-3-1 (>= 3.4.0) |
libgdk-pixbuf2.0-0 (>= 2.22.0) |
libgee2 (>= 0.5.0) |
libgirepository-1.0-1 (>= 0.9.2) |
libgjs0-libmozjs185-1.0 |
libgjs0b (>= 1.32.0-3) |
libgl1-mesa-glx |
OR libgl1 |
libglib2.0-0 (>= 2.31.8) |
libgnome-keyring0 (>= 3.2.2-2~) |
libgnome-menu-3-0 (>= 3.4.2-3~) |
libgstreamer0.10-0 (>= 0.10.20) |
libgtk-3-0 (>= 3.3.9) |
libical0 (>= 0.31) |
libjson-glib-1.0-0 (>= 0.13.2) |
libmozjs185-1.0 (>= 1.8.5-1.0.0+dfsg) |
libmutter0 (>= 3.4) |
libmutter0 (<< 3.5) |
libnm-glib4 (>= 0.8.998) |
libnm-util2 (>= 0.8.998) |
libnspr4 (>= 2:4.9-2~) |
OR libnspr4-0d (>= 1.8.0.10) |
libp11-kit0 (>= 0.2) |
libpango1.0-0 (>= 1.14.0) |
libpolkit-agent-1-0 (>= 0.99) |
libpolkit-gobject-1-0 (>= 0.94) |
libpulse-mainloop-glib0 (>= 0.99.1) |
libpulse0 (>= 0.99.1) |
libsoup2.4-1 (>= 2.4.0) |
libstartup-notification0 (>= 0.11) |
libtelepathy-glib0 (>= 0.17.5) |
libtelepathy-logger2 (>= 0.2.0) |
libx11-6 |
libxcomposite1 (>= 1:0.3-1) |
libxdamage1 (>= 1:1.1) |
libxext6 |
libxfixes3 (>= 1:5.0) |
libxi6 |
libxml2 (>= 2.7.4) |
gnome-shell-common (= 3.4.2-7) |
gir1.2-accountsservice-1.0 |
gir1.2-caribou-1.0 |
gir1.2-gcr-3 |
gir1.2-gconf-2.0 |
gir1.2-gkbd-3.0 |
gir1.2-gnomebluetooth-1.0 |
gir1.2-polkit-1.0 |
gir1.2-upowerglib-1.0 |
gjs (>= 1.30) |
gnome-icon-theme-symbolic (>= 2.91) |
gnome-settings-daemon (>= 3.4.0) |
gnome-themes-standard |
gsettings-desktop-schemas (>= 3.3.2) |
python (>= 2.6) |
telepathy-mission-control-5 |


Recommends (Version) | Installed
=====================================-+-===========
gnome-contacts | 3.4.1-1+b1
gnome-control-center | 1:3.4.3.1-2
gnome-session-fallback | 3.4.2.1-3
gnome-user-guide | 3.4.2-1+build1
unzip | 6.0-8
gkbd-capplet | 3.4.0.2-1


Package's Suggests field is empty.