I have updated the bug to reflect that it's related to the screen saver (desktop idleness), not specifically the lock screen.
** Summary changed: - Lock screen stopped working + Desktop is not restored correctly after screen saver ** Description changed: With the update to 3.28.3-0ubuntu0.18.04.4, on two separate machines, - the lock screen stopped working properly. + the screen saver stopped working properly. - When I enter lock, either manually (by clicking the lock screen icon) or - automatically (by waiting for the lock screen timeout), the screen - either freezes with the desktop still showing, or shoes the same grey - background as the login screen; it does not show the normal lock screen - image. + When the screen is locked manually (by clicking the lock screen icon), + the screen either freezes with the desktop still showing, or shows the + same grey background as the login screen; it does not show the normal + lock screen image. - Pressing a key such as space, which would normally raise the screen - shield and reveal the login dialog, has no effect. + When the screen saver is activated automatically, the screen turns off + as normal, but when I press a key, the grey background as for the login + screen is shown (in fact, it's the same as the login screen, but without + the login widget; that is, the normal icons are shown at the top of the + screen). + Pressing Ctrl+Alt+F1 switches to the login dialog. I can then log in successfully, but all GNOME shell extensions are disabled. (A simple workaround is then to restart gnome-shell with the "r" command from the "Enter a command" dialog.) I am marking this bug as a security vulnerability because in the case that the screen simply freezes, confidential information may be displayed by the failure of the screen shield to activate. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.3-0ubuntu0.18.04.4 ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18 Uname: Linux 4.15.0-43-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 CurrentDesktop: GNOME Date: Fri Jan 18 10:28:59 2019 DisplayManager: gdm3 InstallationDate: Installed on 2014-11-26 (1514 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) SourcePackage: gnome-shell UpgradeStatus: Upgraded to bionic on 2018-08-16 (155 days ago) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1812373 Title: Desktop is not restored correctly after screen saver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1812373/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
