[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: mantic

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: kinetic
** Tags added: mantic

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Ralf Dünkelmann]

Hi Seth,

if only it would be that easy.

Suspending and locking does not circumvent the problem. The only way to
be safe is shutting down on leave and newly boot on return.

Ubuntu is not safe here. This is a major vulnerability.

I love Ubuntu and appreciate all your work. I am a user only and if I
can help, let me know.

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Re: [Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Seth Arnold]

On Mon, Apr 03, 2023 at 06:57:36AM -, Ralf Dünkelmann wrote:
> the bug (https://bugs.launchpad.net/bugs/2013453), that nem000 created
> was marked as a duplicate of this one. This is the case for most of the
> related bugs listed here. So it seems that this here is the issue to go
> ahead with?

Heh, yeah, I'as surprised, I figured keeping newer implementations of
this flaw separate from the older ones would have been the thing to do.

FWIW I've been handing out the "the only safe thing to do is to lock your
workstation before you walk away from it / suspend it" as advice for
twenty years...

Thanks

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Ralf Dünkelmann]

Hi Seth, hi nem000,

the bug (https://bugs.launchpad.net/bugs/2013453), that nem000 created
was marked as a duplicate of this one. This is the case for most of the
related bugs listed here. So it seems that this here is the issue to go
ahead with?

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags added: kinetic

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[nem000]

Hi Seth, thanks for the info! I just filed a bug with "ubuntu-bug" (using it 
the first time so I hope I did it right).
Thanks for your hard work!

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Seth Arnold]

nem000 I'm sure I've seen this bug fixed a dozen times in the last
fifteen years or something. It's just a popular bug to re-implement.
Please file a bug with 'ubuntu-bug gnome-shell' if you're using Gnome;
replace 'gnome-shell' with whatever screenlocker you're using if you're
on a different environment.

Thanks

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[nem000]

Have the exact same problem as originally reported using a Lenovo Thinkpad 
T480s and Ubuntu 22.10 when I close and re-open my laptop.
Very annoying and I can't believe this bug seems to be so old and has survived 
for so many years!

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Ralf Dünkelmann]

with an Eizo monitor connected externally when ubuntu is "on lock", I
can unlock my Laptop completely without typing a password.

This isn't just a bug.

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Re: [Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Free Beachler]

To a non-maintainer-but-longtime-user, it appears that the lock screen
implementation in Gnome (or whatever OS stack) is completely broken -> it
isn't secure, breaks NVIDIA drivers, inexplicably shows a different
rendition (version) of the lockscreen in some cases, and doesn't work with
popular screen savers from the Software manager.

But I suppose it all works for some people.


On Fri, Mar 24, 2023 at 2:15 AM Ralf Dünkelmann <1532...@bugs.launchpad.net>
wrote:

> Hi there,
>
> I am using ubuntu budgie 22 on a tuxedo laptop and can reproduce
> reveiling of content when I lock the screen and connect to an external
> monitor afterwards. When connecting the monitor the lower part of the
> screen is reveiled shortly. When disconnecting the monitor, the upper
> part reveils (and stays visible). Everything before typing the password.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1935690).
> https://bugs.launchpad.net/bugs/1532508
>
> Title:
>   Screen contents revealed briefly on resume, before even unlocking
>
> Status in GNOME Shell:
>   New
> Status in Mutter:
>   New
> Status in gnome-shell package in Ubuntu:
>   Confirmed
> Status in unity package in Ubuntu:
>   Fix Released
> Status in unity source package in Xenial:
>   Fix Released
> Status in gnome-shell package in Debian:
>   Confirmed
>
> Bug description:
>   [Impact]
>
>   When lock is enabled, the screen doesn't get blank/covered by
>   lockscreen before suspending, thus on early resume the content might
>   be shown.
>
>   Video showing the bug: https://youtu.be/dDOgtK1MldI
>
>   Reproduced on Ubuntu 2015.10, Ubuntu 2014.04
>
>   [Test case]
>
>   1. Work on highly secret files
>   2. Close the lid of your laptop and go have a break
>   3. Anyone who opens the lid of the laptop can see the secret files for a
> half second before the lock screen appears
>
>   [Possible Regression]
>
>   Content on screen isn't painted anymore and screen stays black.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/gnome-shell/+bug/1532508/+subscriptions
>
>

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Ralf Dünkelmann]

Hi there,

I am using ubuntu budgie 22 on a tuxedo laptop and can reproduce
reveiling of content when I lock the screen and connect to an external
monitor afterwards. When connecting the monitor the lower part of the
screen is reveiled shortly. When disconnecting the monitor, the upper
part reveils (and stays visible). Everything before typing the password.

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags added: lunar

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Bug Watch Updater]

** Changed in: gnome-shell
   Status: Unknown => New

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Bug Watch Updater]

** Changed in: mutter
   Status: Unknown => New

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Francois Thirioux]

These days I have seen this bug at least twice in Jammy, using Wayland.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Bug watch added: gitlab.gnome.org/GNOME/mutter/-/issues #2133
   https://gitlab.gnome.org/GNOME/mutter/-/issues/2133

** Also affects: mutter via
   https://gitlab.gnome.org/GNOME/mutter/-/issues/2133
   Importance: Unknown
   Status: Unknown

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

Actually maybe keep that conversation in
https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3294 where all the
gnome-shell developers can see it.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

If us developers could reproduce the problem ourselves then we probably
would have already fixed it.

If anyone has instructions on how to reproduce the problem in gnome-
shell then please write them here.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Free Beachler]

This issue has evolved into a monster! It's now a pile of dupes of this
report, an epic saga that stretches back over a decade, and more than
one false claim of repair. Perhaps the steps to reproduce and/or
acceptance criteria weren't accurate.

On top of it -- the screen lock + suspend functionality is broken on
Ubuntu 18+, 20+. For years I've experienced a lock screen that requires
a double-unlock -- with each unlock screen apparently driven by a
different manager (is one X and another gnome?). Then after the double-
unlock I find all GUI apps have been killed. Meanwhile dmesg and syslog
have nothing to show for it. Multiple bug reports and SO threads have
also reported this, with more faux 'solutions' and 'workarounds',
similar to this report.

I think Team Ubuntu is unawares of the terrible state of the broken
suspend and lockscreen "features". If the Team is aware of these issues
and continues to promote Ubuntu non-headless as "ready for the
enterprise", then somebody should call Houston and let them know we've
got a problem. Some/all users cannot use suspend because they risk
losing work, which means increased risk of losing work due to battery
discharge. My laptop has become an always-on workstation thanks to
Ubuntu, and I'm constantly guarding against loss of work while using
Ubuntu.

So now, engineers and professionals that choose Ubuntu can expect a
workstation with an insecure lock screen and battery-drain from unusable
suspend. In other words, Ubuntu OS isn't ready for the enterprise,
unless it's headless.

If there were some decent writeups on how "community members" can go
from getting-started developing for Ubuntu to the more-advanced topics
of fixing problems like this, then maybe this wouldn't be such a
terrible situation.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: hirsute

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Marius Gedminas]

I've seen this three times now on Ubuntu 21.10 (GNOME 40).  I don't
recall ever seeing it on Ubuntu 20.10.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Johannes]

I am affected, although not every time I resume my laptop. Perhaps 10 %
of the times, and possibly with more likelihood if my laptop has been
suspended for a while.

I haven't yet found how to reproduce this bug in a repeatable manner.
Have you got clues? or do you want me to upload some logs (tell me which logs)?

PS: Using Ubuntu 21.04 with GNOME 3.38.

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Re: [Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Free Beachler]

From the investigation I performed earlier this week, this issue appears to
go back at least 10 years. The original report against Ubuntu 16 has a
video that demonstrates the problem clearly. It should suffice as steps to
reproduce.

On Thu, Sep 2, 2021 at 8:11 PM Daniel van Vugt <1532...@bugs.launchpad.net>
wrote:

> I don't think we need new bug reports about this. I've just fixed the
> concern about "unrelated packages" by removing the irrelevant tasks at
> the top of the page. Only the gnome-shell task remains open.
>
> What we really need here is clear instructions for how to reproduce the
> bug in GNOME using a recent Ubuntu release.
>
> ** No longer affects: gdm3 (Ubuntu)
>
> ** Project changed: ubuntu-gnome => mir
>
> ** No longer affects: mir
>
> ** Tags added: hirsute
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1935690).
> https://bugs.launchpad.net/bugs/1532508
>
> Title:
>   Screen contents revealed briefly on resume, before even unlocking
>
> Status in GNOME Shell:
>   Unknown
> Status in gnome-shell package in Ubuntu:
>   Confirmed
> Status in unity package in Ubuntu:
>   Fix Released
> Status in unity source package in Xenial:
>   Fix Released
> Status in gnome-shell package in Debian:
>   Confirmed
>
> Bug description:
>   [Impact]
>
>   When lock is enabled, the screen doesn't get blank/covered by
>   lockscreen before suspending, thus on early resume the content might
>   be shown.
>
>   Video showing the bug: https://youtu.be/dDOgtK1MldI
>
>   Reproduced on Ubuntu 2015.10, Ubuntu 2014.04
>
>   [Test case]
>
>   1. Work on highly secret files
>   2. Close the lid of your laptop and go have a break
>   3. Anyone who opens the lid of the laptop can see the secret files for a
> half second before the lock screen appears
>
>   [Possible Regression]
>
>   Content on screen isn't painted anymore and screen stays black.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/gnome-shell/+bug/1532508/+subscriptions
>
>

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

I don't think we need new bug reports about this. I've just fixed the
concern about "unrelated packages" by removing the irrelevant tasks at
the top of the page. Only the gnome-shell task remains open.

What we really need here is clear instructions for how to reproduce the
bug in GNOME using a recent Ubuntu release.

** No longer affects: gdm3 (Ubuntu)

** Project changed: ubuntu-gnome => mir

** No longer affects: mir

** Tags added: hirsute

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Seth Arnold]

omid, this bug report covers too many unrelated packages to be useful at
this point.

If you're still seeing desktop contents during resume with a currently
supported version of Ubuntu, please file a new bug report with details
on the specific packages you're using and steps to reproduce the issue.
There's no guarantee that it can be addressed but a new bug report with
one specific configuration has a chance. Bug reports are free. Specific
bugs can get fixed. Bugs that collect a bunch of unrelated things are
rarely fixed, there's just too much noise to find anything useful.

Because this bug (among several related bugs) returns in one or more
screenlocker / desktop environment every year or two, the reliable
answer is to always manually lock the screen before walking away from
the computer.

Thanks

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[omid.1985]

Why no one treats this bug as a major security issue with a priority?
This bug exposes sensitive information before even unlocking the
computer.

I can confirm this bug on Ubuntu 21.04.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Ubuntu QA Website]

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/1532508

** Tags added: iso-testing

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[jeejah42]

This bug also appears in Ubuntu Budgie 20.04.2 LTS (Focal Fossa).

```
$ lspci |fgrep -i graphics
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium 
Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 21)
$ 
```

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

This bug does not appear to be related to Xfce, yet. If it does happen
in Xubuntu then please add a new task at the top of the page.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[^rooker]

I can also confirm this (Xubuntu 20.04.2).
Hardware is a HP Probook 430 G6.

lspci says this about the graphics card:
"Intel Corporation UHD Graphics 620"

Thanks in advance!

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: xenial

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Bug watch added: gitlab.gnome.org/GNOME/gnome-shell/-/issues #3294
   https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/3294

** Changed in: gnome-shell
   Status: New => Unknown

** Changed in: gnome-shell
 Remote watch: gitlab.gnome.org/GNOME/gnome-shell/issues #332 => 
gitlab.gnome.org/GNOME/gnome-shell/-/issues #3294

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Cristiano Nunes]

I use Ubuntu 20.04.1 (focal), and I have the same problem. I confirm
this bug.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags added: focal

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: disco

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Bug Watch Updater]

** Changed in: gnome-shell
   Status: Unknown => New

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Tom Reynolds]

Watch existing bug on GNOME Gitlab. Previously, this was
https://bugzilla.gnome.org/show_bug.cgi?id=753678

** Bug watch added: gitlab.gnome.org/GNOME/gnome-shell/issues #332
   https://gitlab.gnome.org/GNOME/gnome-shell/issues/332

** Bug watch added: bugzilla.gnome.org/ #753678
   https://bugzilla.gnome.org/show_bug.cgi?id=753678

** Changed in: gnome-shell
   Importance: Medium => Unknown

** Changed in: gnome-shell
   Status: In Progress => Unknown

** Changed in: gnome-shell
 Remote watch: GNOME Bug Tracker #753678 => 
gitlab.gnome.org/GNOME/gnome-shell/issues #332

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[rubo77]

I don't agree with PeterPall! On my Ubuntu 19.10 Laptop, I still got the
screen visible after suspend due to lid-close for a glimpse of a moment

The bug is still open.

A solution to this security issue would be to set the action on lid-
close to "lock" instead of "suspend", see:
https://askubuntu.com/questions/1200456/on-awake-the-unlocked-desktop-
shows-for-a-blink-moment

Does someone know a workaround in Ubuntu 19.10 with still using the
"suspend" option?

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Sean]

Can confirm I am getting this on 19.04 ubuntu budgie and am up to date

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: trusty

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: cosmic

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[PeterPall]

In 19.10 the problem seems to be gone, too. But I once whilst cleaning
my keyboard got a glimpse on the locked screen => There might be a more
subtle bug, still.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Nicolas_Raoul]

Original poster here.

I switched to 19.04 (disco) in April, and I have never seen this bug
again since (default window manager and everything).

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

** Tags removed: wily zesty
** Tags added: bionic

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Dan Kortschak]

Still present in 18.04.2.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Jason Bassett]

Also affecting my Ubuntu 16.04 LTS laptop, all updates installed.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Thorsten]

I also still have this issue with the default 18.04.1 version. However,
i installed a newer mesa version (which also upgrades a bunch of other
dependencies) using the padoka stable ppa and since then the issue is
gone.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Artem Mikhmel]

Still having the same issue:
Linux DEll-XPS15 4.16.7-041607-generic #201805021131 SMP Wed May 2 15:34:55 UTC 
2018 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 18.04.1 LTS

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Dan Dascalescu]

I still see this issue in a configuration very similar to comment #33:

* ThinkPad X1 Carbon 6th Gen with integrated Intel Graphics
* Ubuntu 18.04.1 fresh install

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[PeterPall]

On my machine (Disco/Gnome on Wayland) the problem still happens. But
the fix has changed something because it no more happens all the time
but only for the right suspend reasons.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[PeterPall]

On my machine (disco/gnome on Wayland) it also still appears.
But something has changed: a few months ago the screen contents was visible on 
each resume. Now it makes a difference if the computer suspended due to a lack 
of activity (in this case the computer seems to always only lock the screen. A 
few seconds after resuming), due to me pressing the "suspend" key (in this case 
the screen either locks quickly on resume or is already locked in resume) or 
due to closing the laptop lid: in the latter case if I open my laptop the 
screen is already locked 

** Tags added: cosmic disco

** Tags removed: verification-done

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[spm2011]

Still experiencing this with Bionic gnome-shell 3.28.3-0ubuntu0.18.04.3

I was actually able to move the mouse for a second before the lock
screen appeared.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Bill Billson Billingham]

I am experiencing this on Thinkpad T460s running 64 bit Ubuntu 18.04.1
(4.15.0-42-generic) with Gnome 3.28.2, utilizing Intel® Core™ i7-6600U
CPU @ 2.60GHz × 4, Intel® HD Graphics 520 (Skylake GT2)

I was not experiencing this problem on the same machine running 16.04,
and only started experiencing it after upgrading to 18.04

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

OK then. We still have three reports of this bug still happening after
the fix that was in bug 1768786:

 * https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1532508/comments/25
 * 
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1428307/comments/3
 * bug 1800426

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Marco]

My report (1806983) is slightly different and more problematic: when the bug 
occurs, the interface, the app bar now keeps beeing buggy until I reboot and 
the unlock interface doesn't shows at all even if I re-put on suspend and 
re-resume.
I had the "desktop showed for one second" bug but it this case I have the "lock 
screen not showed at all" one

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

Make that four reports, including bug 1800426.

** Changed in: gnome-shell (Ubuntu)
   Importance: Undecided => High

** Changed in: gdm3 (Ubuntu)
   Importance: Undecided => High

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

Fun fact: My iPhone 8 has the same bug when I wake it in the morning :)

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

OK. Reopening this bug for gnome-shell. Despite the fact that bug 1768786 
declared it fixed, we now have at least three reports that it is not fixed for 
gnome-shell:
  * https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1532508/comments/25
  * 
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1428307/comments/3
  * bug 1806983

** Also affects: gnome-shell (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: gnome-shell (Ubuntu)
   Status: New => Confirmed

** Also affects: gdm3 (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: gdm3 (Ubuntu)
   Status: New => Confirmed

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Thorsten]

oky i will create a new bug report

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

It would be strange to keep this older bug open after having declared it
fixed in the newer bug 1768786. If you want to do that then OK (re-add
the gnome-shell task). But it might be a better idea to log a new bug
(run: ubuntu-bug gnome-shell). That way we can track the details of
affected systems and have a chance of closing some peoples' bug reports
as fixed without contradicting others for whom it's still a problem.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Thorsten]

this bug still occurs for me on ubuntu 18.04 using gdm 3.28.2 and gnome-
shell 3.28.2. However, my laptop (x1 carbon gen6) only supports S0i3
(activated with the kernel parameter "acpi.ec_no_wakeup=1") and not s3.
So is it possible that this bug is only fixed for S3? It does not occur
when using wayland.

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

Gnome Shell was just fixed, but it was tracked as bug 1768786. So I'm
going to remove the gnome-shell tasks from here

** No longer affects: gnome-shell (Fedora)

** No longer affects: gdm3 (Ubuntu)

** No longer affects: gnome-shell (Ubuntu)

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Seth Arnold]

Florian, please file a new bug against whatever packages kubuntu uses
for screen locking for this.

Thanks

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Florian Sinatra]

I'm also experiencing this bug on kubuntu 18.04.

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Pedro Côrte-Real]

I also confirm this on 18.04

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Thorsten]

for me this bug is only happening in 18.04 when using the X session and
does not occur when using wayland

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[J3K]

Still experiencing this bug in Ubuntu Budgie 18.04. Shows the last (pre-
hibernate) screen for a brief instant on wake, before displaying the
login screen.

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Daniel van Vugt]

This bug is still open for 18.04 as indicated by:

gnome-shell (Ubuntu)  Confirmed

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Nicolas_Raoul]

Original poster here, I confirm the bug is still present in 18.04 (work
on secret files -> close laptop lid -> anyone opening the lid can
sometimes see the content even without unlocking) although it happens
much less frequently than in 16.04 in my personal experience.

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Cezanne Vahid]

Confirmed that this bug occurs when the user has Automatic Screen Lock
turned off in Privacy settings.

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Cezanne Vahid]

Also experiencing this bug on 18.04 (XPS13 9370)

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[wysiwyg31]

also visible on 18.04 (XPS13 9370)

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Juha Luoma]

I'm still seeing this bug with fully updated 16.04. Machine is HP
EliteBook G2, Intel graphics, external display attached via dock's
displayport interface.

unity 7.4.5+16.04.20180221-0ubuntu1

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Launchpad Bug Tracker]

This bug was fixed in the package unity - 7.4.5+16.04.20171201.3

---
unity (7.4.5+16.04.20171201.3) xenial; urgency=medium

  [ Marco Trevisan (Treviño) ]
  * InputMonitor: add an unity class that monitors XInput2 events and
converts them to XEvent
  * EdgeBarrierController: use InputMonitor to get the barrier events
instead of relying on its implementation
  * DecorationsMenuLayout: use input monitor for menu scrubbing (LP:
#1614597)
  * PanelView: use InputMonitor to track menu events
  * LockScreenPanel: use InputMonitor events instead of mouse polling
for menu scrubbing
  * MenuManager: add support for mouse trackers with triangle algorithm
support (LP: #1618405)
  * PanelView: scale gradient refinement properly
  * PanelService: don't allow to deactivate menus if they've been opened
too shortly
  * LockScreenController: ignore icon_paths_changed signal in
menumanager for Lockscreen
  * LockScreenController: use InputMonitor to get all the events and
hide the Blank Window (LP: #1321075)
  * LockScreenController: use input monitor to get the events to switch
monitor (LP: #1316862)
  * LauncherOptions: use track_obj to manage option changes (LP:
#1622995)
  * UnityScreen: toggle gestures recognition on lock (LP: #1645507)
  * GnomeSessionManager: add gcancellable to instance and use it for
calls with temporary proxies
  * BackgroundSettings: use gnome-bg to generate textures with proper
scaling (LP: #1666359)
  * UnityWindow: safely check validity of UnityWindow from scaled one
(LP: #1659847)
  * Panel: ensure the menu-manager tracker is updated to match monitor
(LP: #1671432)
  * compiz-profile-setter: tool to update the current profile and use in
systemd and Unity settings (LP: #1668950)
  * BGHash, UnityScreen: get desktop averageColor from compiz
  * Launcher: disable or reduce most icon effects on lowgfx (LP:
#1700859)
  * PanelController: ensure we disconnect from signals on destruction
(LP: #1504870)
  * tools: add migration script to set the default values for unity-
lowgfx profile

  [ Andrea Azzarone ]
  * Properly handle the file manager copy dialog in
FileManagerLauncherIcon and in StorageLauncherIcon. (LP: #1575452,
LP: #1609845)
  * Correctly position the force quit dialog when scaling is different
than 1.0 (LP: #1637991)
  * GnomeSession: Retrieve the session id using dbus if $XDG_SESSION_ID
is not set
  * Round gtk scaling factor to closest integer. (LP: #1649736)
  * Keep the screen locked if rebooting with autologin. (LP: #1600389)
  * Use g_mkdir_with_parents instead of mkdir.
  * Lockscreen: always draw the background-color in the lockscreen (LP:
#1702701)
  * Refactor the way UserAuthenticator is created and passed around.
Handle failures to create new threads and fallback to a "Switch to
greeter..." button in case of failure. (LP: #1311316)
  * Wait until the color buffer is cleared before suspending. (LP:
#1532508)

  [ Kai-Heng Feng ]
  * UnitySettings: If scale-factor is not set, find and set right scale
for HiDPI displays.

  [ Eleni Maria Stea ]
  * shouldn't create blur rectangles when there's no blur, skips the
blur rects processing in low gfx.
  * removes lowgfx option from ccsm, reads the "lowgfx" gsetting (LP:
#1668950)

  [ Nick Dedekind ]
  * Fixed tooltip scaling issues. (LP: #1673950)

 -- Marco Trevisan (Treviño)   Fri, 01 Dec 2017 18:46:01
+

** Changed in: unity (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Doug McMahon]

** Tags removed: verification-needed
** Tags added: verification-done

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Doug McMahon]

fine now  in unity 7.4.5+16.04.20171201.3

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Nikita Yerenkov-Scott]

I hadn't noticed this bug in a while. And then suddenly yesterday (on
Arch Linux) it appeared!

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  Screen contents revealed briefly on resume, before even unlocking

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[Bug 1532508] Re: Screen contents revealed briefly on resume, before even unlocking

[Bug Watch Updater]

** Changed in: gnome-shell (Fedora)
   Status: Unknown => In Progress

** Changed in: gnome-shell (Fedora)
   Importance: Unknown => High

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