Thanks for responding. The lack of apparmor denials means that it is highly unlikely that the apparmor update is the cause. I'm going to redirect this bug report and adjust the title.
** Also affects: unity (Ubuntu) Importance: Undecided Status: New ** Changed in: apparmor (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/1618537 Title: Apparmor update breaks Ctrl-ALt-L Status in apparmor package in Ubuntu: Invalid Status in unity package in Ubuntu: New Bug description: After updating apparmor in 16.04 LTS, Ctrl-Alt-L no longer switches to the lock screen. Switching profiles does work however. When using Ctrl-ALt-L the screen flickers and remains logged in without any screen locking whatsoever. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1618537/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp