*** This bug is a duplicate of bug 390989 ***
https://bugs.launchpad.net/bugs/390989
** This bug has been marked a duplicate of bug 390989
[SecurityRoadmap] Locked screen shows the desktop
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https://bugs.launchpad.net/bugs/909170
Title:
Lock screen sometimes lets you through for a moment
Status in “gnome-screensaver” package in Ubuntu:
New
Bug description:
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.
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