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

[Sergiy Matrunchyk]

Binary package hint: unity

Actually I don't know what I did to produce this error.

$ lsb_release -rd
Description: Ubuntu Natty (development branch)
Release: 11.04

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.6-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86 Kernel Module 270.30 Fri Feb 25 14:34:41 PST 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu1)
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,grid,imgsvg,compiztoolbox,imgjpeg,mousepoll,water,resize,commands,vpswitch,session,debugspew,imgpng,wall,move,titleinfo,regex,gnomecompat,thumbnail,staticswitcher,resizeinfo,wobbly,animation,workarounds,expo,fade,scale,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Tue Apr 12 15:49:07 2011
DistUpgraded: Log time: 2011-03-21 12:55:51.607912
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/lib/unity/unity-panel-service
GraphicsCard:
 nVidia Corporation G96 [GeForce 9500 GT] [10de:0640] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:82f4]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InstallationMedia_: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
InstallationMedia__: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
JockeyStatus: xorg:nvidia_current - Драйвер прискореної графіки NVIDIA (Комерційний, Дозволено, Використовується)
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANGUAGE=uk_UA:en
 LANG=uk_UA.utf8
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae root=UUID=200ca29d-4202-40f3-8f69-80dcd1035b63 ro
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
ProcVersionSignature__: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Renderer: Unknown
SegvAnalysis:
 Segfault happened at: 0xb7242c91: mov (%eax,%edx,1),%eax
 PC (0xb7242c91) ok
 source "(%eax,%edx,1)" (0x00000004) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 g_settings_backend_path_changed () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/gio/modules/libdconfsettings.so
 g_simple_async_result_complete () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in g_settings_backend_path_changed()
UpgradeStatus: Upgraded to natty on 2011-03-21 (22 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare www-data
dmi.bios.date: 02/03/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: TMIBX10H.86A.0029.2010.0203.1403
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DQ57TM
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE70931-402
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrTMIBX10H.86A.0029.2010.0203.1403:bd02/03/2010:svn:pn:pvr:rvnIntelCorporation:rnDQ57TM:rvrAAE70931-402:cvn:ct3:cvr:
version.compiz: compiz 1:0.9.4+bzr20110411-0ubuntu1
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Apport retracing service (apport)]

StacktraceTop:
 g_settings_backend_dispatch_signal (backend=0x980e0e8, function_offset=4, name=0xb2a91510 "/com/canonical/indicator/datetime/", data1=0x0, data1_copy=0xb72427e0 <pointer_id>, data1_free=0xb72427f0 <pointer_ignore>, data2=0x0) at /build/buildd/glib2.0-2.28.5/./gio/gsettingsbackend.c:334
 g_settings_backend_path_changed (backend=0x980e0e8, path=0xb2a91510 "/com/canonical/indicator/datetime/", origin_tag=0x0) at /build/buildd/glib2.0-2.28.5/./gio/gsettingsbackend.c:490
 add_match_done (source=0x980a848, result=0xb2c35350, user_data=0xb1c83e68) at dconfsettingsbackend.c:552
 g_simple_async_result_complete (simple=0xb2c35350) at /build/buildd/glib2.0-2.28.5/./gio/gsimpleasyncresult.c:747
 g_dbus_connection_call_done (source=0x980a848, result=0xb2c31100, user_data=0xb2c33e20) at /build/buildd/glib2.0-2.28.5/./gio/gdbusconnection.c:5003

[Launchpad Janitor (janitor)]

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

[Sebastien Bacher (seb128)]

does the bug happen often? what do you do to get it? do you use a nfs user directory?

[Sergey "Shnatsel" Davidoff (shnatsel)]

I don't use NFS, all my OS is one big ext4 partition

[Sebastien Bacher (seb128)]

That's still happening, unity-greeter got a bit over 30 instance of that bug reported since the start of the month... Ryan, do you think that's something that would be fixable in the current version for precise?

[Steve Langasek (vorlon)]

The Precise Pangolin has reached end of life, so this bug will not be fixed for that release