Comment 3 for bug 1306769

What does "meant to be part of the notification stack" mean? That sounds like it's assuming the question.

Imagine that ten Skype messages arrive, leading to a 60-second-long queue of notification bubbles on top of the lock screen. As soon as you see the first bubble, you slide the screen to unlock it so you can see any earlier messages and reply. Should Ubuntu wait 60 seconds for the notification bubbles to go away before showing you the PIN dialog? Of course not. The dialog should appear immediately, regardless of what notifications are queued. I don't see why they need to be managed together at all.