Comment 0 for bug 983268

This error happened soon after I connected the HDMI cable which connects my laptop to my TV screen.

Unity and compiz crashed: the top bar and side bar of unity disappeared, and all open applications which were spread over multiple workspaces were put on one workspace. However, everything also restarted and I lost no work.

I've connected the HDMI cable before, and never had this error happen before (although I've only been using 12.04 for three weeks).

I don't know if this is related, but at the exact moment the problem occurred, I was moving my mouse over the indicators, trying to change the volume settings.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu3
Architecture: i386
CheckboxSubmission: 60a1cbca22e9e051c51fe9ef4512b4a7
CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e
Date: Mon Apr 16 19:21:55 2012
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=nl_BE:nl
 PATH=(custom, user)
 LANG=nl_BE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb45fbf9e <_ZN5unity2ui21EdgeBarrierController4Impl21OnPointerBarrierEventEPNS0_21PointerBarrierWrapperESt10shared_ptrINS0_12BarrierEventEE+78>: mov (%edx),%eax
 PC (0xb45fbf9e) ok
 source "(%edx)" (0x03000000) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::ui::EdgeBarrierController::Impl::OnPointerBarrierEvent(unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent>) () from /usr/lib/compiz/libunityshell.so
 sigc::internal::slot_call2<sigc::bound_mem_functor2<void, unity::ui::EdgeBarrierController::Impl, unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent> >, void, unity::ui::PointerBarrierWrapper*, std::shared_ptr<unity::ui::BarrierEvent> >::call_it(sigc::internal::slot_rep*, unity::ui::PointerBarrierWrapper* const&, std::shared_ptr<unity::ui::BarrierEvent> const&) () from /usr/lib/compiz/libunityshell.so
 unity::ui::PointerBarrierWrapper::EmitCurrentData() () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in unity::ui::EdgeBarrierController::Impl::OnPointerBarrierEvent()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo