compiz crashed with SIGSEGV in g_str_equal() from g_hash_table_lookup() from g_variant_type_info_get()

[dave]

Compiz just crashed, almost immediately after logging into my profile Ubuntu 12.10 beta

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: compiz-core 1:0.9.8.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-16.25-generic 3.5.4
Uname: Linux 3.5.0-16-generic x86_64
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_64 Kernel Module 304.43 Sun Aug 19 20:14:03 PDT 2012
 GCC version: gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
.proc.driver.nvidia.warnings.fbdev:
 Your system is not currently configured to drive a VGA console
 on the primary VGA device. The NVIDIA Linux graphics driver
 requires the use of a text-mode VGA console. Use of other console
 drivers including, but not limited to, vesafb, may result in
 corruption and stability problems, and is not supported.
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
CheckboxSubmission: 380054587e328456b5c9205648ffb5d9
CheckboxSystem: 669b662da410063cc918e0f60cf6cddf
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Wed Oct 3 08:31:52 2012
DistUpgraded: 2012-09-22 16:06:09,294 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 304.43, 3.5.0-15-generic, x86_64: installed
 nvidia-current, 304.43, 3.5.0-16-generic, x86_64: installed
DpkgLog:

ExecutablePath: /usr/bin/compiz
GraphicsCard:
 NVIDIA Corporation GT218 [GeForce 310M] [10de:0a75] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c06a]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
JockeyStatus:
 kmod:nvidia_experimental_304 - Experimental NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
 kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
MachineType: SAMSUNG ELECTRONICS CO., LTD. R780/R778
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-16-generic root=UUID=5aabea01-d6c6-4fa2-a5e7-3f5c8d8a55dd ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7f172e160526: movdqu (%rdi),%xmm1
 PC (0x7f172e160526) ok
 source "(%rdi)" (0x140051e000000000) not located in a known VMA region (needed readable region)!
 destination "%xmm1" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 g_str_equal () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_hash_table_lookup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_variant_type_info_get () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in g_str_equal()
UpgradeStatus: Upgraded to quantal on 2012-09-22 (10 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
XsessionErrors:
 gnome-session[2230]: WARNING: Failed to start app: Unable to start application: Failed to execute child process "docky" (No such file or directory)
 gnome-session[2230]: WARNING: Application 'compiz.desktop' killed by signal 11
 gnome-session[2230]: WARNING: App 'compiz.desktop' respawning too quickly
 gnome-session[2230]: CRITICAL: We failed, but the fail whale is dead. Sorry....
dmi.bios.date: 03/17/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 06JA.M027.20100317.LDG
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: R780/R778
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: 06JA
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr06JA.M027.20100317.LDG:bd03/17/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR780/R778:pvr06JA:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR780/R778:rvr06JA:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: R780/R778
dmi.product.version: 06JA
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.8.4-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu5
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu2

[Apport retracing service (apport)]

StacktraceTop:
 g_str_equal (v1=<optimized out>, v2=<optimized out>) at /build/buildd/glib2.0-2.34.0/./glib/ghash.c:1704
 g_hash_table_lookup_node (hash_return=<synthetic pointer>, key=0x7f171401d4e0, hash_table=0xe2a4c0) at /build/buildd/glib2.0-2.34.0/./glib/ghash.c:422
 g_hash_table_lookup (hash_table=0xe2a4c0, key=key@entry=0x7f171401d4e0) at /build/buildd/glib2.0-2.34.0/./glib/ghash.c:1074
 g_variant_type_info_get (type=type@entry=0x7f171401d4c0) at /build/buildd/glib2.0-2.34.0/./glib/gvarianttypeinfo.c:750
 g_variant_alloc (trusted=1, serialised=0, type=0x7f171401d4c0) at /build/buildd/glib2.0-2.34.0/./glib/gvariant-core.c:477

[Daniel van Vugt (vanvugt)]

Compiz doesn't use this kind of glib functionality. More likely something that Unity uses indirectly. Don't know what.

[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-reopen”. See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.