gnome-screensaver freezes on checking

[Kainalu]

When attempting to unlock the gnome-screensaver, the system will lock on "checking" and I must switch to a virtual terminal and kill gnome-screensaver to reach my desktop. I have tried with multiple screen savers. It is also possible to use the "switch users" feature and use GDM to get back to the desktop.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-screensaver 2.30.2-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Fri Jul 15 11:45:53 2011
EcryptfsInUse: Yes
GconfGnomeSession:
 idle_delay = 20
  /desktop/gnome/session/required_components:
   windowmanager = gnome-wm
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to natty on 2011-06-06 (39 days ago)
WindowManager: gnome-wm