I updated the GNOME Shell by these points: sudo add-apt-repository ppa:ricotz/testing sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update && sudo apt-get dist-upgrade sudo apt-get install gnome-shell Unfortunately, no longer work themes and extensions. http://oi41.tinypic.com/2hwfsix.jpg How can I fix it (or return to the previous version)? Regards and I hope to help. Edit: I noticed that I can not update gnome-shell-extension-common