I am also seeing this on Ubuntu 15.04. Oddly enough it worked for me on Ubuntu 14.04 though.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-greeter in Ubuntu. https://bugs.launchpad.net/bugs/1372157 Title: Unity Greeter does not follow desktop background Status in unity-greeter package in Ubuntu: Confirmed Bug description: I will be referencing this bug https://bugs.launchpad.net/bugs/844081 1) "lsb_release -rd" output: Description: Ubuntu 14.04.1 LTS Release: 14.04 2) "apt-cache policy unity-greeter" output unity-greeter: Installed: 14.04.10-0ubuntu1 Candidate: 14.04.10-0ubuntu1 Version table: *** 14.04.10-0ubuntu1 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 100 /var/lib/dpkg/status 14.04.9-0ubuntu1 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 3)I change my desktop wallpaper to a picture I have imported from my mobile phone or from the internet, Unity greeter should show me my desktop wallpaper when I select my User account ready to log in. 4) Instead, Unity Greeter shows me the default Ubuntu wallpaper. Oh, I wanted to add that Installing another Wallpaper pack "sudo apt-get install ubuntu-wallpapers-"releasename" and selecting one of those wallpapers still reverts back to the default wallpaper on the login screen. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1372157/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp