Been doing some more investigation on this problem. Looked in System Settings->Security & Privacy and found on the Security tab that both "Waking from suspend" and "Returning from blank screen" were both checked, indicating password required in both cases. Unchecked both items and the problem has now gone away - functionality is now as expected. Not sure if these items were checked under 14.04 and just ignored when resuming from suspend or whether the upgrade to 14.10 actually set these items. Bug can now be closed.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1386186 Title: Screen locking issue - account with no password set To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1386186/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs