I have this bug too on my 14.04.1 LTS, login does not show my wallpaper as it should, it shows default Ubuntu wallpaper, lockscreen correctly shows my wallpaper but login does not, it is a fresh installation and fully updated.
lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.1 LTS Release: 14.04 Codename: trusty apt-cache policy unity-greeter unity-greeter: Installed: 14.04.10-0ubuntu1 Candidate: 14.04.10-0ubuntu1 Version table: *** 14.04.10-0ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 100 /var/lib/dpkg/status 14.04.9-0ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages dpkg -l | grep unity-greeter ii unity-greeter 14.04.10-0ubuntu1 amd64 Unity Greeter dpkg -l | grep lightdm ii liblightdm-gobject-1-0 1.10.1-0ubuntu1 amd64 LightDM GObject client library ii lightdm 1.10.1-0ubuntu1 amd64 Display Manager -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1372157 Title: Unity Greeter does not follow desktop background To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1372157/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs