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[Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx>]

Unable to reproduce, is this still an issue with updates?

** Changed in: xserver-xorg-video-nouveau (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1207985

Title:
  compiz assert failure: compiz: pthread_mutex_lock.c:65:
  __pthread_mutex_lock: Zusicherung »mutex->__data.__owner == 0« nicht
  erfüllt.

Status in “unity” package in Ubuntu:
  Invalid
Status in “xserver-xorg-video-nouveau” package in Ubuntu:
  Incomplete

Bug description:
  Just followed this guide:
  http://unity.ubuntu.com/mir/using_mir_on_pc.html. After restarting
  lightdm, unity won't start.

  ProblemType: Crash
  DistroRelease: Ubuntu 13.10
  Package: unity 7.1.0+13.10.20130802-0ubuntu1
  ProcVersionSignature: Ubuntu 3.10.0-6.17-generic 3.10.3
  Uname: Linux 3.10.0-6-generic x86_64
  ApportVersion: 2.12-0ubuntu2
  Architecture: amd64
  AssertionMessage: compiz: pthread_mutex_lock.c:65: __pthread_mutex_lock: Zusicherung »mutex->__data.__owner == 0« nicht erfüllt.
  Date: Sat Aug  3 15:00:00 2013
  ExecutablePath: /usr/bin/compiz
  InstallationDate: Installed on 2013-08-03 (0 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130802)
  MarkForUpload: True
  ProcCmdline: compiz
  ProcEnviron:
   LANGUAGE=de_AT:de
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_AT.UTF-8
   SHELL=/bin/bash
  Signal: 6
  SourcePackage: unity
  StacktraceTop:
   __assert_fail_base (fmt=0x7f370806fdbb <Address 0x7f370806fdbb out of bounds>, assertion=assertion@entry=0x7f370ec207ef "mutex->__data.__owner == 0", file=file@entry=0x7f370ec20dfe "pthread_mutex_lock.c", line=line@entry=65, function=function@entry=0x7f370ec208c0 <__PRETTY_FUNCTION__.8369> "__pthread_mutex_lock") at assert.c:92
   __GI___assert_fail (assertion=0x7f370ec207ef "mutex->__data.__owner == 0", file=0x7f370ec20dfe "pthread_mutex_lock.c", line=65, function=0x7f370ec208c0 <__PRETTY_FUNCTION__.8369> "__pthread_mutex_lock") at assert.c:101
   __GI___pthread_mutex_lock (mutex=0xfefefefefefefeff) at pthread_mutex_lock.c:65
   ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
   ?? () from /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
  Title: compiz assert failure: compiz: pthread_mutex_lock.c:65: __pthread_mutex_lock: Zusicherung »mutex->__data.__owner == 0« nicht erfüllt.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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