*** This bug is a duplicate of bug 1532508 ***
https://bugs.launchpad.net/bugs/1532508
'gnome-screensaver' isn't used in any modern versions of Ubuntu so this
needs to be reassigned and/or merged with bug 1532508...
** Package changed: gnome-screensaver (Ubuntu) => ubuntu
** Tags removed:
We're mid 2021 and this security issue is still present.
Confirmed on Ubuntu 20.04. Also on Zorin OS 15 (Ubuntu 18.04 based).
Besides only getting medium priority, I cannot understand that this
medium priority security issue hasn't been assigned, leave alone fixed
in nearly 7 years.
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Also see this on 20.10 on a Dell XPS 15 9550.
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Title:
Desktop contents displayed on resume, before lock screen is shown
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Affects Ubuntu 21.04.
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage notifications about this bug go to:
I confirm this on Ubuntu Mate 20.04.1. Desktop is visible for a second
before the lockscreen when I resume from power menu >> suspend or from
systemctl suspend but if I resume after suspending by closing the lid on
my Dell XPS 13 9360 the desktop is not visible before the lockscreen.
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The issue still persists in Ubuntu 20.04. Running mate with lightdm and
light-locker configured to lock-on-suspend enabled. After resuming, the
desktop contents before suspend are visible for roughly 5 seconds,
before the lock screen appears.
As this is absolutely unacceptable in terms of
This bug has been reported on the Ubuntu ISO testing tracker.
A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1280300
** Tags added: iso-testing
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Lubuntu 19.10 QA-test (live) on lenovo thinkpad sl510 (c2d-t6570, 2gb
ram, i915)
suspended system, waited, it resumed (image was visible briefly before
xscreensaver covered screens; screensaver woke on touch of key - i'll
record as https://bugs.launchpad.net/ubuntu/+source/gnome-
** Changed in: gnome-screensaver (Ubuntu)
Status: Invalid => Confirmed
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Title:
Desktop contents displayed on resume, before lock screen
I'd imagine a workaround could be to have a hook for suspend write to
the framebuffer, but I failed at getting this working when I tried today
(put a script in /usr/lib/systemd/system-sleep to invoke eog in
fullscreen).
Regarding the comment above about this being fixed in "certified"
laptops,
I also experience this buggy behavior on a fresh install of Ubuntu
18.04, using the default Gnome Shell desktop. This bug has been around
for at least 7 years (see https://bugs.launchpad.net/ubuntu/+source
/unity-2d/+bug/830348). How is it still unaddressed?
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I experience the same bug I am running a freshly installed Ubuntu 18.04
with unity.
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Title:
Desktop contents displayed on resume, before lock
I got the same security issue with Cairo Dock and Ubuntu 14.04 in Acer
Aspire E 14 ES1-411-28SF every time laptop wake up
I tried to put a command on sleep event but this occurs on wake up
Tengo el mismo problema de seguridad con Cairo Dock y Ubuntu 14.04 en
Acer Aspire E 14 ES1-411-28SF cada
I have same issue on Kubuntu 18.04 Is the NSA forcing someone to leave
this in on purpose?
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Title:
Desktop contents displayed on resume, before
Getting this as well on 16.04, but only recently. Started happening
about 4 months ago. Mine is worse because I can open it up and start
working on it. Sometimes I'll be on it for like 10 mins before it
finally shuts me out and makes me login.
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Same issue on a Lenovo t440s, Ubuntu 17.10 (Gnome shell).
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage
gethin, that seems plausibly like it could suffer from the same problems
as #49579 -- if you have a menu open or a virtualbox window to a guest
or similar, the screensaver 'lock' command may not be able to lock the
display.
That's why we recommend using the lock interface in the menus or
keyboard
Another workaround that I used for Cinnamon. I can't imagine it would be
too much trouble to adapt it to other window managers:
1. Use dconf-editor to change the button-suspend action at org>cinnamon
>settings-daemon>plugins>power to 'nothing' (you could also amend lid-
close-ac-action and
The workaround below fixes a bug in the above workaround:
*
#!/bin/sh
viewnior --fullscreen '/home/user_name/Images/My solid color image which
obscures my desktop.png' &
sleep 2 &&
dbus-send --system --print-reply --dest=org.freedesktop.login1
/org/freedesktop/login1
Below is a workaround I use.
*
#!/bin/sh
viewnior --fullscreen '/home/user_name/Images/My solid color image which
obscures my desktop.png' && sleep 2 && dbus-send --system --print-reply
--dest=org.freedesktop.login1 /org/freedesktop/login1
"org.freedesktop.login1.Manager.Suspend"
This bug started happening on my laptop after installing 16.04. With
12.04 there never was any problem and I never had this problem with an
older laptop, from 8.04 to 15.10.
I'm running XDG_CURRENT_DESKTOP=GNOME-Flashback:Unity
Given the suggestion at #17 I'll open a new bug for that DE.
That's an excellent suggestion, I'll look into doing that. Thanks!
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Title:
Desktop contents displayed on resume, before lock screen is shown
To
Mark, thanks for such detailed explanation and extremely fast response!
It's grave news for me to hear that X11 is the major problem here. Would
it be better if your publish it in Ubuntu FAQ (or elsewhere) and close
all these bugs with "won't fix" to make community realize the point?
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There is no way to fix this as long as X11 is still being used. Lock
screen timing issues are usually caused by a few different things:
1- Hardware issues. Certain models of computers have known issues where
they don't generate the proper events when the laptop lid is closed or
the suspend hotkey
seth-arnold, imho, this problem systematically reported in different
versions of Ubuntu with different desktop environments and seems like
ignored by developers. The security threat is severe and the root of the
problem lies much deeper than patching a concrete combination of
components. Confess I
mbp, this looks like a 'garbage pit' style bug report; the original
complaint from two years ago is filed against gnome-screensaver but the
automatically included text reports unity was being used. Comments since
then include complaints about xfce and gnome 3 environments too.
There's no
This security bug has been open for 4.5 years now.
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage
Having this on a Dell Prestige 3510, with Ubuntu 15.10 and XFCE
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Title:
Desktop contents displayed on resume, before lock screen is shown
To
Same issue on Dell XPS 13 2015 (9343) Ubuntu 15.10.
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage
I have the same defect on HP Envy, Ubuntu 15.10
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage
Dell Inspiron 15
Ubuntu 15.10
3.6.1-7ubuntu1
Happy to troubleshoot if needed.
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Title:
Desktop contents displayed on resume, before lock
Same here, ubuntu 15.10 unity. hp probook gd450
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage
Yes me too, Ubuntu 15.10 Unity, Toshiba Chromebook 2. I've the below as
I thought it was an issue with the screensaver after reading other
sites. No luck:
gsettings set org.gnome.desktop.screensaver ubuntu-lock-on-suspend 'true'
sudo sed -i "s/NoDisplay=true/NoDisplay=false/g"
I have this issue with both Unity and Gnome 3. Running Ubuntu 15.10 on
an Asus Zenbook UX305.
I've also been able to type briefly before it autolocks (see 830348).
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I also have this issue (Ubuntu 15.10, Lenovo T450s), every time.
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Title:
Desktop contents displayed on resume, before lock screen is shown
To
Still seeing this bug (Ubuntu-Gnome 15.10, with Gnome 3) too.
I too think this is a security issue. They don't even need to steal my laptop
-- just flip it open and power it on briefly, and be ready with a smartphone to
take a picture at the screen contents.
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Still seeing this bug in Ubuntu 15.10 64-bit with Unity 3D, and have
seen it in every Ubuntu version going back to at least 2011, across
several different laptops from different manufacturers (Chromebook,
Thinkpad, and Dell something-or-other). It happens reliably every time
I resume from suspend
I did not experience it on my machine prior to 15.10, but after
upgrading to 15.10 it happens consistently every time when resuming from
suspend.
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happens with gnome 3.16 on ubuntu 15.10
do you need any more information? is this being worked on?
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Title:
Desktop contents displayed on resume,
** Tags added: 15.10
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Title:
Desktop contents displayed on resume, before lock screen is shown
To manage notifications about this bug go to:
** Tags added: lockscreen
** Tags added: resume suspend
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Title:
Desktop contents displayed on resume, before lock screen is shown
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** Tags added: rls-t-incoming
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Title:
Desktop contents displayed on resume, before lock screen is shown
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-screensaver (Ubuntu)
Status: New = Confirmed
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It has a moderate impact on a core package.
** Information type changed from Public to Public Security
** Changed in: gnome-screensaver (Ubuntu)
Importance: Undecided = Medium
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