It was activating a few options of compiz config, but when it activates the option "wallpaper", to be able to have different images in every office. first I unite awhile the screen, which is normal, that in order that it works this option it is necessary to deactivate a thing in ubuntu tweak or in gnome tweak tool, after deactivating it works perfectly. But later I realized that when I right click on the desktop nothing happens. I found that for arregrarlo
gconf-publisher had to open, go to apps > nautilus > preferences, and to activate show "desktop", but me this option does not appear, only it goes out saying:
desktop fond, navigation_window_saved_geometry, navigation_window_saved_maximized start_with_sidebar.