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[Launchpad Bug Tracker <909170@xxxxxxxxxxxxxxxxxx>]

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Ubuntu 11.10 - fully updated as of 27th December 2011

I have encountered several times a problem whereby my laptop, set to
lock after the screen turns off (after being inactive for 10 minutes)
will show the desktop once I wiggle my mouse to turn the display back
on. This will give the person operating the laptop full access for about
5 seconds, at which time the screen will spontaneously start to fade (as
it does when you lock it) and then display the lock screen. Almost as
though the lock screen activation program hasn't caught up with the
screen turning off until a few moments after it is turned back on.

This is a problem because anyone can come to the computer and see
exactly what I've been doing and have full access to the machine for
about five seconds.

Another issue I have seen is where the lock screen dialog shows over the
desktop (under the same circumstance of the display turning back on when
you wiggle the mouse/touchpad). This means people can see everything
that is running even though they can't access it.

This is in addition to the bug I reported earlier where the lock screen
shows the top bar with the currently running application named.

Another issue, which is not so much a bug as a design flaw, is that the
lock screen does, in fact, fade in instead of just appearing when you
press CTRL+ALT+L. It should blank the display immediately or at least
display the lock screen so that if you locked it to stop someone seeing
something who, say, just walked into the room, they wouldn't just see a
gradual fading of something sensitive.

** Affects: gnome-screensaver (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Lock screen sometimes lets you through for a moment
https://bugs.launchpad.net/bugs/909170
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