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: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/964675 Title: gnome-control-center crashed with SIGSEGV in gtk_widget_size_allocate() Status in gnome-control-center package in Ubuntu: Invalid Bug description: in tab "monitors" show error "Расширение RANDR отсутствует" ProblemType: Crash DistroRelease: Ubuntu 12.04 Package: gnome-control-center 1:3.3.92-0ubuntu4 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic-pae 3.2.12 Uname: Linux 3.2.0-20-generic-pae i686 NonfreeKernelModules: nvidia ApportVersion: 1.95-0ubuntu1 Architecture: i386 Date: Sun Mar 25 21:42:25 2012 ExecutablePath: /usr/bin/gnome-control-center InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120217) ProcCmdline: gnome-control-center display ProcEnviron: SHELL=/bin/bash LANG=ru_RU.UTF-8 SegvReason: reading NULL VMA Signal: 11 SourcePackage: gnome-control-center 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/964675/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp