*** This bug is a security vulnerability ***
You have been subscribed to a public security bug by Marc Deslauriers
(mdeslaur):
I have a laptop with led backlight.
When the locking the screen and then hitting return key the old screen(screen
before lock) is displayed for a short period then the lock screen is displayed.
I assume this is because if I
had an older style backlight the delay would be happing while the backlight is
warning up.
Since this is an led backlight there is no warm up (delay) between turning on
the screen backlight
and the display showing.
This is a also a security problem because any person walking up to the lock
laptop can see what
was on the screen before locking without a password.
If need I can record the whole thing with my smart phone to show the
security issue.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.3-1ubuntu1~20.04.2
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Uname: Linux 5.4.0-40-generic x86_64
NonfreeKernelModules: zfs nvidia_modeset zunicode zavl icp zcommon znvpair
nvidia
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 16 17:02:59 2020
DisplayManager: gdm3
InstallationDate: Installed on 2020-03-30 (108 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: mutter-common 3.36.3-0ubuntu0.20.04.1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
--
Gnome Lock screen shows old screen before lock screen
https://bugs.launchpad.net/bugs/1887861
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