screen locking doesn't work

[Ahmed EL Zein]

I upgraded from 12.04 to 14.04 and one of the artifacts that appeared after the upgrade was that I was not able to lock the screen.

I have tried using Ctrl-Alt-L as well as running gnome-screensaver -l and in both cases the screen goes blank but then activity just brings everything back with out asking for a password or anything.

This also happens when I suspend the laptop. When I open the lid I find myself immediatly in the descktop instean of having to unlock my screen as I would normaly do.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-screensaver 3.6.1-0ubuntu9
ProcVersionSignature: Ubuntu 3.13.0-14.34-generic 3.13.5
Uname: Linux 3.13.0-14-generic x86_64
ApportVersion: 2.13.2-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Mar 2 09:47:07 2014
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session session-name 'ubuntu'
 org.gnome.desktop.session idle-delay uint32 300
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to trusty on 2014-02-27 (2 days ago)