*** This bug is a duplicate of bug 1532508 ***
https://bugs.launchpad.net/bugs/1532508
Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1532508, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report. Feel free to continue to report any other bugs you may
find.
** This bug has been marked a duplicate of bug 1532508
Screen contents revealed briefly on resume, before even unlocking
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https://bugs.launchpad.net/bugs/1588521
Title:
Login screen bypassed for at least 20 seconds after awakening machine
from suspend
Status in GNOME Shell:
Confirmed
Status in Ubuntu GNOME:
Confirmed
Status in gnome-shell package in Ubuntu:
Confirmed
Bug description:
Since upgrading to GNOME 3.20 on Ubuntu GNOME 16.04 I have noticed
something rather worrying which has occurred twice so far, this is
what I have observed:
1. After opening my laptop lid the screen either goes black or
displays a frozen state of the shield opening or something similar
2. Then it suddenly shows Firefox (the last window I had open, though
I did minimize it before suspending my machine my closing the laptop
lid) and actually allows me to use my mouse to interact with it by
going to a new tab, or really anything I want, I haven't tried to see
if I am able to type in this state yet or not, but I will update this
report the next time I manage to test it out. This is obviously a
really bad thing for security as for at least 20 long seconds (each
time it occurs it seems to last longer) it logs you straight back in
and bypasses the login screen, though for some reason the title part
of the window and everything above that are completely black as if
someone just put a big black box over them.
3. I then suddenly see black and no Firefox (this black only lasts for
a short period though), then I see what I see when I would normally
log in for the first time (my background image coming in with that
getting larger image with the top bar at the top of it), and then it's
back to the normal locked screen as it should be.
The sequence of events (what I see on my screen) seems to vary between
occasions, but the ability to interact with my machine without having
to log in stays even though it at some point does register that it
should really be taking me to the locked screen. And I have checked
and if I for instance open a new tab and go to one of my bookmarks in
Firefox during this strange bypassing period, when I properly log back
in again (and find Firefox minimized as I left it) I find that that
tab is still open so the changes are real and lasting.
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