Screen not locked when coming out of suspend/hibernate

Screen not locked when coming out of suspend/hibernate Ubuntu 12.10.
Has worked but works for some updates

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-screensaver 3.6.0-0ubuntu2.1
ProcVersionSignature: Ubuntu 3.5.0-25.39-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
Date: Thu Mar 28 15:11:58 2013
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 600
 org.gnome.desktop.session session-name 'ubuntu'
InstallationDate: Installed on 2012-06-11 (289 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
SourcePackage: gnome-screensaver
Symptom: security
Title: Screen not locked when coming out of suspend/hibernate
UpgradeStatus: Upgraded to quantal on 2013-01-05 (81 days ago)