Screen shown briefly after opening closed laptop lid, before even unlocking

Bug #1532508 reported by Nicolas_Raoul on 2016-01-10
414
This bug affects 37 people
Affects Status Importance Assigned to Milestone
GNOME Shell
In Progress
Medium
Ubuntu GNOME
Undecided
Unassigned
gnome-shell (Debian)
Confirmed
Unknown
gnome-shell (Ubuntu)
High
Unassigned
Nominated for Xenial by Marco Trevisan (Treviño)
unity (Ubuntu)
High
Andrea Azzarone
Nominated for Xenial by Marco Trevisan (Treviño)
Xenial
Undecided
Unassigned

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.

Related branches

CVE References

information type: Private Security → Public Security
Changed in unity (Ubuntu):
status: New → Confirmed
Andrea Azzarone (azzar1) wrote :

This is actually due to a graphic driver issue that we cannot workaround in unity. In xenial we reduced a bit the problem but we cannot completely remove it.

I can reproduce this issue in Ubuntu GNOME 16.04 with GNOME 3.20. Should updating the graphics driver fix the issue?

Changed in ubuntu-gnome:
status: New → Confirmed
Changed in gnome-shell (Ubuntu):
status: New → Confirmed
sunox (sunox9) wrote :

I experience this only when using compton compositor. This is on a Thinkpad T430 running Xubuntu 16.04.

Rael Gugelmin Cunha (rael-gc) wrote :

Started to happen to me on Ubuntu 16.04.2 with Intel graphics too (Dell Precision M3800). I was using 16.04 and then made a fresh install of 16.04.2

Nybo (renenybo) on 2017-04-08
information type: Public Security → Private Security
information type: Private Security → Public Security
tags: added: trusty wily xenial
Changed in gnome-shell (Debian):
status: Unknown → Confirmed
Changed in gnome-shell:
importance: Unknown → Medium
status: Unknown → In Progress
Changed in gnome-shell (Ubuntu):
importance: Undecided → High
Changed in unity (Ubuntu):
importance: Undecided → High
tags: added: zesty
Andrea Azzarone (azzar1) on 2017-09-19
Changed in unity (Ubuntu):
assignee: nobody → Andrea Azzarone (azzar1)
status: Confirmed → In Progress
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package unity - 7.5.0+17.10.20170925.1-0ubuntu1

---------------
unity (7.5.0+17.10.20170925.1-0ubuntu1) artful; urgency=medium

  [ Andrea Azzarone ]
  * Fix build issues with gcc-7 and g++-7
  * 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)

  [ Marco Trevisan (Treviño) ]
  * Tests: split unit tests in single binaries, enable unstable tests
  * debian/rules: ignore warnings in armhf and ppc64el

 -- Marco Trevisan (Treviño) <mail@3v1n0.net> Mon, 25 Sep 2017 16:05:06 +0000

Changed in unity (Ubuntu):
status: In Progress → Fix Released
description: updated

Hello Nicolas_Raoul, or anyone else affected,

Accepted unity into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/unity/7.4.5+16.04.20171116 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

Changed in unity (Ubuntu Xenial):
status: New → Fix Committed
tags: added: verification-needed verification-needed-xenial
Łukasz Zemczak (sil2100) wrote :

Hello Nicolas_Raoul, or anyone else affected,

Accepted unity into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/unity/7.4.5+16.04.20171201.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-xenial to verification-done-xenial. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-xenial. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

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