** Information type changed from Private Security to Public Security -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1752168
Title: Lock screen bypass by disconnecting monitor Status in gnome-shell package in Ubuntu: Invalid Bug description: Edit: after testing it again, the bug did not occur. I will try to close or delete it, and create another more specific bug if I can figure out the exact circumstances that cause the problem. I am using Ubuntu 17.10 with Gnome. It is possible to bypass an active lock screen by disconnecting (unplugging) all monitors connected to the computer. When the monitor is connected back again, the unlocked desktop is available. On some monitors (e.g. LG TV 55UF772V) it is enough to turn off the monitor's power, which is how I discovered the problem. I have attached the Xorg log, but there are no messages related to the monitor being connected or disconnected. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.2-0ubuntu0.1 ProcVersionSignature: Ubuntu 4.13.0-36.40-generic 4.13.13 Uname: Linux 4.13.0-36-generic x86_64 NonfreeKernelModules: zfs zunicode zavl zcommon znvpair nvidia_modeset nvidia ApportVersion: 2.20.7-0ubuntu3.7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Feb 27 21:19:24 2018 DisplayManager: gdm3 InstallationDate: Installed on 2016-07-27 (580 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) SourcePackage: gnome-shell UpgradeStatus: Upgraded to artful on 2017-10-21 (129 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1752168/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
