Something has to draw a window over the user's session. Lightdm does _not_ do this.
If you use dm-tool to tell lightdm to lock the screen, it calls logind over dbus, and whatever you use in the user's session to hide the screen needs to receive the dbus signal from logind to lock the screen. In Unity, it is gnome-screensaver, in GNOME, it is gnome-shell. I don't believe XScreensaver listens to logind signals over dbus, hence, if you want to use XScreensaver in lubuntu, you need to call it to lock the screen before you use dm-tool. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1205384 Title: Lock can be circumvented by switching to console Status in “lightdm” package in Ubuntu: Invalid Status in “lxsession” package in Ubuntu: Confirmed Bug description: Steps to reproduce: 1)lock your screen using "dm-tool switch-to-greeter" or "dm-tool lock" 2)switch to console via ctrl+alt+F1 3)switch back to X via ctrl+alt+F7 Result: session is unlocked without entering a password Expected behaviour: session should still be locked when switching back to X ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: lightdm 1.7.7-0ubuntu2 ProcVersionSignature: Ubuntu 3.10.0-5.15-generic 3.10.2 Uname: Linux 3.10.0-5-generic i686 ApportVersion: 2.11-0ubuntu1 Architecture: i386 Date: Fri Jul 26 17:30:23 2013 InstallationDate: Installed on 2013-07-26 (0 days ago) InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Alpha i386 (20130723.1) MarkForUpload: True SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1205384/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
