*** This bug is a security vulnerability ***
You have been subscribed to a public security bug by Seth Arnold (seth-arnold):
STEPS TO REPRODUCE:
1. Lock screen
2. Disconnect external display (if none was connected, connect one, and then
disconnect it)
3. User applications are displayed on the screen for a fraction of a second,
then the lock screen is displayed again.
I can produce a video showing the problem, if needed.
Hardware notes:
* HP ProBook 640 G1 connected to HP Z27 Display using DisplayPort cable.
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: libkscreenlocker5 5.16.5-0ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18
Uname: Linux 5.3.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.8
Architecture: amd64
Date: Mon Apr 27 21:31:21 2020
ProcEnviron:
LANGUAGE=
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: kscreenlocker
UpgradeStatus: Upgraded to eoan on 2020-04-21 (7 days ago)
** Affects: kscreenlocker (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug eoan
--
kscreenlocker shows user applications when external display is disconnected
https://bugs.launchpad.net/bugs/1875521
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