compiz crashed with SIGSEGV in ScaleScreen::getWindows()

[William Oprandi]

Hi,

It has been crashed just while switching between opened windows.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: unity 7.1.2+14.04.20140312-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
Uname: Linux 3.13.0-16-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CrashCounter: 1
CurrentDesktop: Unity
Date: Thu Mar 13 21:10:34 2014
ExecutablePath: /usr/bin/compiz
InstallationDate: Installed on 2014-03-09 (4 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140304)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f76371d8980 <_ZNK11ScaleScreen10getWindowsEv>: mov 0x48(%rdi),%rax
 PC (0x7f76371d8980) ok
 source "0x48(%rdi)" (0x00000048) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ScaleScreen::getWindows() const () from /usr/lib/compiz/libscale.so
 unity::UnityScreen::OnInitiateSpread() () from /usr/lib/compiz/libunityshell.so
 sigc::internal::signal_emit0<void, sigc::nil>::emit(sigc::internal::signal_impl*) () from /usr/lib/compiz/libunityshell.so
 unity::PluginAdapter::OnScreenGrabbed() () from /usr/lib/compiz/libunityshell.so
 unity::UnityScreen::handleEvent(_XEvent*) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in ScaleScreen::getWindows()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 ScaleScreen::getWindows (this=0x0) at /build/buildd/compiz-0.9.11+14.04.20140310/plugins/scale/src/scale.cpp:676
 unity::UnityScreen::OnInitiateSpread (this=0x2afd200) at /build/buildd/unity-7.1.2+14.04.20140312/plugins/unityshell/src/unityshell.cpp:532
 sigc::internal::signal_emit0<void, sigc::nil>::emit (impl=0x301bf20) at /usr/include/sigc++-2.0/sigc++/signal.h:776
 emit (this=0x2bc50a8) at /usr/include/sigc++-2.0/sigc++/signal.h:2673
 unity::PluginAdapter::OnScreenGrabbed (this=0x2bc4ee0) at /build/buildd/unity-7.1.2+14.04.20140312/unity-shared/PluginAdapter.cpp:89

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andrea Azzarone (azzar1)]

Is scale plugin enabled?

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]

[Jeff Pennington (jj-penn)]

I'm still getting this bug with Ubuntu 15.04.

[Psykotik (linux-ikiru)]

I get this but on Ubuntu 14.04. On a very regular basis (10 times a day!)

[Zdenek (balderys)]

It was happening for long time also after upgrading to 15.04. But once unity completely disappeared and I found

<code>dconf reset -f /org/compiz/ && setsid unity</code>

which completely solved my old problem

http://askubuntu.com/questions/204428/unity-missing-cant-see-top-or-side-panels
http://askubuntu.com/questions/620947/how-do-i-reset-my-unity-configuration-on-15-04