gnome-screensaver crashed with SIGSEGV in gtk_style_context_get_valist()

[deschmit]

~$ lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04

~$ apt-cache policy gnome-screensaver
gnome-screensaver:
  Installed: 3.2.1-0ubuntu1
  Candidate: 3.2.1-0ubuntu1
  Version table:
 *** 3.2.1-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

When my screen goes to sleep, sometimes it doesn't wake up correctly. The whole screen is black except the mouse pointer which I can move around. If I vnc or teamview in to my box I can see the entire screen fine. I've found if I then start nvidia-settings, my screen comes back to life. Before I found this trick, I had to kill my session to be able to see my screen again.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-screensaver 3.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sun Feb 26 15:39:37 2012
ExecutablePath: /usr/bin/gnome-screensaver
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 600
 org.gnome.desktop.session session-name 'ubuntu'
ProcCmdline: gnome-screensaver
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f4d3d48a3a7 <gtk_style_context_get_valist+215>: mov 0x30(%rax),%rdx
 PC (0x7f4d3d48a3a7) ok
 source "0x30(%rax)" (0x00000030) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-screensaver
StacktraceTop:
 gtk_style_context_get_valist () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 gtk_style_context_get () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 gtk_style_context_set_background () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gnome-screensaver crashed with SIGSEGV in gtk_style_context_get_valist()
UpgradeStatus: Upgraded to precise on 2012-02-26 (0 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin mythtv plugdev sambashare
WindowManager: No value set for `/desktop/gnome/session/required_components/windowmanager'

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #926936, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.