My Ubuntu 20.04 installation just did this - something changed the org.gnome.desktop.lockdown disable-lock-screen to true and also the blank screen to never (did an update do this?).
But there's nothing I can see in gnome-control-center to modify this value, making this bug pretty obscure when it happens. Wouldn't a setting in g-c-c make a lot of sense if you can actually disable the screen lock completely? -- 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/1715435 Title: Can't lock screen with keyboard shortcuts when using lightdm Status in gnome-shell package in Ubuntu: Confirmed Status in lightdm package in Ubuntu: Confirmed Bug description: Trying to use Super+L or Ctrl+Alt+L, I cannot lock the screen. Additionally, if I wait a very long time the screen does not lock either. Switching from LightDM to GDM3 fixes the issue. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.25.91-0ubuntu3 ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8 Uname: Linux 4.12.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: GNOME Date: Wed Sep 6 09:17:35 2017 DisplayManager: lightdm InstallationDate: Installed on 2016-01-22 (592 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160117) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1715435/+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
