I confirm what Antoine said. Try to run either: sudo apt-get install gdm
or sudo dpkg-reconfigure lightdm (if you've already installed gdm but left lightdm as the default login manager) and select gdm as the default login manager. The issue is gone. This is related to the lockscreen used by lightdm which is different from the one used by gdm. Infact the function which causes the problem is called "lock". This is the body: /* Fallback code to handle session locking using gnome-screensaver, in case the required GDM dependency is not there */ [... some code ...] lock: function() { this._proxy.call('Lock', null, Gio.DBusCallFlags.NONE, -1, null, Lang.bind(this, function(proxy, result) { proxy.call_finish(result); <------ the cause is this call this.emit('lock-screen-shown'); })); }, [... some more code ...] The problem is that neither gnome-screensaver nor gdm are installed so none of the above mentioned "dependencies" is satisfied (my might-be-wrong personal opinion). I didn't try installing gnome-screensaver instead of gdm though, it could work too. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1057960 Title: Suspend does not work in Gnome-Shell To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1057960/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs