Screen lockup when screen is locked and laptop lid is closed for an extend period of time

Binary package hint: gnome-screensaver

I currently have my laptop set up to automatically lock my screen whenever I close my laptop lid, but I suppose this could still occur if the screen is manually locked and the lid is subsequently closed. Whenever I leave my laptop in the aforementioned state for a period of time (the two times this has happened have been at least an hour), I come back to my laptop, open the lid and find my screen appearing to be unlocked. I look a the clock and notice that it is frozen at around the time I left (or maybe sometime after, my memory's a little fuzzy). I have no choice but to kill the X server using the handy Ctrl+Alt+Backspace shortcut.

I tried to do a bit of troubleshooting. I set my power settings to cut off the display after 1 minute. I locked my screen, closed my lid, and waited for a few minutes. I opened it up to find what I expected, the unlock screen. So either it is not leaving the lid down for more than the Power Manager settings, or it takes longer for that combo to wreck havoc.

Also note that my screen saver was not changed, i.e. is set to "Blank Screen."

I apologize for the long winded bug report.

When this occurs again, I will follow the directions at https://wiki.ubuntu.com/X/Troubleshooting/Freeze and post the acquired information here.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gnome-screensaver 2.30.2-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
Architecture: amd64
Date: Mon Feb 28 20:29:13 2011
GconfGnomeSession:
 idle_delay = 5
  /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
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to natty on 2011-02-26 (2 days ago)
WindowManager: gnome-wm