I've only checked it in VirtualBox but Franz Hsieh the original bug reporter mentioned earlier in comment #9 that this was fixed.
The locking isn't immediate but it happens after about 5 seconds so it's a good response time from GUI. ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1398287 Title: Unity 14.04 Lock button sometimes takes 30~60s to enter lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1398287/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs