Both those commands contact D-Bus to activate the screensaver. In 14.04 Unity provides this D-Bus interface. GNOME Screensaver provided this interface in older versions.
You may want to check: - You are not running gnome-screensaver in your session - it is not required. i.e. "ps aux | grep gnome-screensaver" shows nothing. - If you are running these commands from another session (is this what you mean by logged in via SSH?) then they need to access the correct session bus. You should file a bug against unity if activating the D-Bus interface (directly or via gnome-screensaver-command/xdg-screensaver) is not working correctly. -- 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/1338814 Title: dm-tool lock command does display proper lock screen Status in “lightdm” package in Ubuntu: Invalid Bug description: The dm-tool "lock" command does not bring up the normal lock screen (achieved when using Unity by hitting Ctrl+l), but rather a user switcher screen that allows for logging in as another user. It also has a few other different properties, like showing an accessibility icon (not displayed in the regular lock screen and stopping any playing music (which continues to play in the regular lock screen). It seems to do the exact same thing as the command "dm-tool switch-to- greeter." This has the side effect of, since Ubuntu 14.04, making it impossible to lock the screen from the terminal. See here for a discussion of older methods that no longer work: http://askubuntu.com/questions/457204/how-can-i-lock-the-screen-using-the-new-lockscreen-from-the-command-line Thanks. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic i686 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: i386 CurrentDesktop: Unity Date: Mon Jul 7 18:34:42 2014 InstallationDate: Installed on 2014-03-10 (119 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1) SourcePackage: lightdm UpgradeStatus: Upgraded to trusty on 2014-04-18 (80 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1338814/+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
