Received the same error after reboot today in Oneiric (Linux ubuntu- desktop 3.0.0-9-generic #12-Ubuntu SMP Sat Aug 20 18:54:43 UTC 2011 i686 i686 i386 GNU/Linux).
Package: metacity Version: 1:2.34.1-1ubuntu1 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/806170 Title: metacity crashed with SIGSEGV in SmcCloseConnection() Status in “metacity” package in Ubuntu: Confirmed Bug description: Just popup after a restart, and before the reboot I was doing apt-get update && dist-upgrade ProblemType: Crash DistroRelease: Ubuntu 11.10 Package: metacity 1:2.34.0-0ubuntu2 ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5 Uname: Linux 3.0-3-generic x86_64 Architecture: amd64 Date: Wed Jul 6 04:19:15 2011 ExecutablePath: /usr/bin/metacity InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) ProcCmdline: metacity ProcEnviron: LANG=en_HK.UTF-8 LANGUAGE=en_HK:en SHELL=/bin/false PATH=(custom, no user) SegvAnalysis: Segfault happened at: 0x7fedd175b236 <SmcCloseConnection+22>: mov 0x8(%rdi),%r14 PC (0x7fedd175b236) ok source "0x8(%rdi)" (0x00000008) not located in a known VMA region (needed readable region)! destination "%r14" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: metacity StacktraceTop: SmcCloseConnection () from /usr/lib/x86_64-linux-gnu/libSM.so.6 ?? () ?? () g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 Title: metacity crashed with SIGSEGV in SmcCloseConnection() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/806170/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

