If I set the "screen" to turn off after any time, e.g. 3 minutes, the system will freeze. On the other hand, if I set it to "never" the problem does not occur.

[Daniel Senderowicz]

The problem is very consistent. The machine is a Dell Dimension 1100.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-screensaver 3.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic i686
NonfreeKernelModules: slamr
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Mon Dec 26 14:13:56 2011
ExecutablePath: /usr/bin/gnome-screensaver
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
SourcePackage: gnome-screensaver
UpgradeStatus: Upgraded to oneiric on 2011-12-04 (22 days ago)
XsessionErrors:
 (gnome-settings-daemon:1587): GLib-CRITICAL **: g_variant_get_int32: assertion `g_variant_is_of_type (value, G_VARIANT_TYPE_INT32)' failed
 (check-new-release-gtk:11758): Gtk-WARNING **: Unknown property: GtkMessageDialog.has-separator