I believe this is a duplicate of bug #990908 ('Won't honor "Do Nothing" when Lid is Closed'). As described in that bug, the computer suspends when the lid is closed even though you've selected "Do Nothing" in the power preferences.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/995840 Title: When laptop lid is closed screen locks even if it should not To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/995840/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs