Just as a note: light-locker isn't installed in Unity by default, so did you manually install it? Unity has a new lockscreen in 14.04, so could be that that one is creating a conflict that breaks the keyboard shortcut.
Re-assigning the bug to Unity then. ** Package changed: light-locker-settings (Ubuntu) => unity (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity in Ubuntu. Matching subscriptions: dp-unity https://bugs.launchpad.net/bugs/1327902 Title: light-locker shortcut won't work Status in “unity” package in Ubuntu: New Bug description: As advised in README I set a customized shortcut "light-locker-command -l" that overrides the default one (Super+L). Super+L still triggers the other old locking system that shows the wallpaper instead of light-dm picture. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1327902/+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