The bug hasn't seen any activity in years and there has been no recent
similar reports, the code also changed quite a lot since and it's likely
the issue doesn't exist anymore. Closing, feel free to open a new report
if you still get problems in recent Ubuntu versions

** Changed in: gnome-control-center (Ubuntu)
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/979959

Title:
  "gnome-control-center display" crashes if no RANDR extension

Status in gnome-control-center package in Ubuntu:
  Invalid

Bug description:
  The problem can be reproduced at will by clicking on display settings
  icon, but also by typing this :

  gnome-control-center display

  A window appears, complains "Could not get screen information" "RANDR
  extension is not present".

  $ LC_ALL=C gnome-control-center display

  (gnome-control-center:13078): Gtk-WARNING **: GtkTable does not have a
  property called expand

  (gnome-control-center:13078): Gtk-WARNING **: GtkTable does not have a
  property called fill

  (gnome-control-center:13078): Gtk-WARNING **: GtkTable does not have a
  property called position

  (gnome-control-center:13078): GLib-GObject-WARNING **: invalid (NULL)
  pointer instance

  (gnome-control-center:13078): GLib-GObject-CRITICAL **: 
g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
  Erreur de segmentation (core dumped)

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: gnome-control-center 1:3.4.0-0ubuntu6
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu2
  Architecture: amd64
  Date: Thu Apr 12 16:41:38 2012
  ExecutablePath: /usr/bin/gnome-control-center
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120410)
  ProcCmdline: gnome-control-center --overview
  ProcEnviron:
   PATH=(custom, user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7fb28dcb7c07 <gtk_widget_size_allocate+23>:  mov    
0x18(%rdi),%rbp
   PC (0x7fb28dcb7c07) ok
   source "0x18(%rdi)" (0x00000018) not located in a known VMA region (needed 
readable region)!
   destination "%rbp" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gnome-control-center
  StacktraceTop:
   gtk_widget_size_allocate () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
   ?? () from /usr/lib/libgnome-control-center.so.1
   g_cclosure_marshal_VOID__BOXEDv () from 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: gnome-control-center crashed with SIGSEGV in gtk_widget_size_allocate()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  usr_lib_gnome-control-center:
   activity-log-manager-control-center 0.9.4-0ubuntu3
   deja-dup                            22.0-0ubuntu2
   gnome-bluetooth                     3.2.2-0ubuntu5
   indicator-datetime                  0.3.94-0ubuntu1

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