Seems to be fixed now (using gnome-shell 3.24.2-0ubuntu6) The screen now fades out and locks. Even though I'm still using lightdm.
** Changed in: gnome-shell (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1692762 Title: [screensaver] Screen never blanks in Gnome Shell when using LightDM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1692762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs