I've read through many of the questions on AskUbuntu about disabling the lock-screen. Everything I've tried, from setting the lock-screen to "Off" in the Privacy window, to setting the dconf flag:
gsettings set org.gnome.desktop.lockdown disable-lock-screen true
Nothing seems to work, still when I close the lid of my laptop and open it the lock-screen appears and asks for my password.
gsettings set org.gnome.desktop.screensaver ubuntu-lock-on-suspend false
If not using suspend then set laptop lid close todo nothing
(only suspend & do nothing are valid options in org.gnome.settings-daemon.plugins.power, the others no longer work – doug Sep 18 '15 at 01:02