Unable to return to Gnome desktop after waking up from suspend

Hello!
I have a problem.
I suspended my laptop (Sony VAIO F13Z1R) yesterday with opened kvm window (a was testing Raring on USB flash - kvm -m 1024 -hda /dev/sdb).
Today's morning I was unable to wake up my laptop to Gnome desktop.

I entered a password, but after that nothing happens.
I use two monitor configuration - laptop screen was black, external monitor shows only desktop wallpaper (without mouse pointer).

I switched to console (Ctrl+Alt+F1), killed gnome-screensaver process, returned to graphical VT (Alt+F7) and saw a Gnome desktop.
It's abnormal behavior of gnome-screensaver.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-screensaver 3.4.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-38.61-generic 3.2.37
Uname: Linux 3.2.0-38-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
CheckboxSubmission: a3c9de473bf7a483a92609c6b20d2aee
CheckboxSystem: b633b4f40868d491c2ae5b50030ce6f3
Date: Tue Mar 5 11:16:01 2013
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 300
 org.gnome.desktop.session session-name 'ubuntu'
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_US:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to precise on 2012-09-28 (157 days ago)
WindowManager: metacity