unity-panel-service crashed with SIGSEGV in g_data_set_internal()

[David Henningsson]

It happened when fiddling when connecting or disconnecting an external HDMI receiver. I kind of remember compiz crashing similarly.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: unity-services 5.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-14.23-generic 3.2.3
Uname: Linux 3.2.0-14-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,resize,vpswitch,compiztoolbox,mousepoll,imgpng,session,snap,regex,gnomecompat,move,grid,wall,unitymtgrabhandles,animation,fade,expo,workarounds,scale,ezoom,unityshell]
CompositorRunning: compiz
Date: Tue Feb 7 14:10:25 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1413]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120103)
MachineType: Hewlett-Packard HP ProBook 4520s
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-14-generic root=UUID=0c069640-8019-48e1-87d9-a9e8f171aa34 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f5f09fa8c85 <g_datalist_id_set_data_full+341>: mov 0x0(%r13),%esi
 PC (0x7f5f09fa8c85) ok
 source "0x0(%r13)" (0xaaaaaaaaaaaaaaa8) not located in a known VMA region (needed readable region)!
 destination "%esi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 g_datalist_id_set_data_full () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? ()
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_datalist_id_set_data_full()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 06/29/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68AZZ Ver. F.08
dmi.board.name: 1413
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 57.1D
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68AZZVer.F.08:bd06/29/2010:svnHewlett-Packard:pnHPProBook4520s:pvr:rvnHewlett-Packard:rn1413:rvrKBCVersion57.1D:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ProBook 4520s
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0~rc2-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0~rc2-0ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.11.3-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901-1ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Apport retracing service (apport)]

StacktraceTop:
 g_data_set_internal (dataset=0x0, new_destroy_func=0, new_data=0x0, key_id=53, datalist=0x1db6010) at /build/buildd/glib2.0-2.31.16/./glib/gdataset.c:373
 g_datalist_id_set_data_full (datalist=0x1db6010, key_id=53, data=0x0, destroy_func=0) at /build/buildd/glib2.0-2.31.16/./glib/gdataset.c:680
 g_object_real_dispose (object=0x1db6000) at /build/buildd/glib2.0-2.31.16/./gobject/gobject.c:1001
 g_object_unref (_object=0x1db6000) at /build/buildd/glib2.0-2.31.16/./gobject/gobject.c:2971
 panel_service_class_dispose (object=0x1d97090) at /build/buildd/unity-5.2.0/services/panel-service.c:146

[Launchpad Janitor (janitor)]

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

[shankao (shankao)]

Is this bug fixed already? Has the fix being propagated (or does it need to be) to the currently supported Ubuntu releases?

[Stephen M. Webb (bregma)]

Downgrading bug importance since (a) the unity-panel-service will restart automatically so functionality is not lost and (2) it's been over a year since the bug was reported, it hardly falls under the definition of 'critical'.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix.
These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes.
Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag "desktop-bugscrub-reopened". See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.