compiz crashed with SIGSEGV in sn_monitor_context_ref()

[Didier Roche-Tolomelli]

Binary package hint: compiz

Getting it reliably at startup with latest stack, without the init order workaround. Trying with it then.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.2.1+glibmainloop4-0ubuntu6
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic i686
Architecture: i386
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x600
 edid-base64: AP///////wAiZOkDfx0AACUTAQOAFg14CoA2ml5dkSggT1QAAAABAQEBAQEBAQEBAQEBAQEB7BMA4kBYUCBdIxUE3IEAAAAZAAAA/gAAAAAAAAAAAAAAAAAAAAAA/ABIU0QxMDBJRlcxCiAgAAAAEAAKICAgICAgICAgICAgAKM=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Fri Jan 28 18:41:02 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:

ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Subsystem: ASUSTeK Computer Inc. Device [1043:8340]
   Subsystem: ASUSTeK Computer Inc. Device [1043:8340]
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: ASUSTeK Computer INC. 1005HA
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 LC_MESSAGES=fr_FR.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-12-generic root=UUID=96d060cd-18db-42ff-9e7d-554ea40b0fa8 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x83ee56 <sn_monitor_context_ref+6>: addl $0x1,(%eax)
 PC (0x0083ee56) ok
 source "$0x1" ok
 destination "(%eax)" (0x00400001) in non-writable VMA region: 0x003d9000-0x00416000 r-xp /lib/libpcre.so.3.12.1
SegvReason: writing VMA /lib/libpcre.so.3.12.1
Signal: 11
SourcePackage: compiz
StacktraceTop:
 sn_monitor_context_ref () from /usr/lib/libstartup-notification-1.so.0
 ?? () from /usr/lib/libstartup-notification-1.so.0
 sn_list_foreach () from /usr/lib/libstartup-notification-1.so.0
 ?? () from /usr/lib/libstartup-notification-1.so.0
 sn_list_foreach () from /usr/lib/libstartup-notification-1.so.0
Title: compiz crashed with SIGSEGV in sn_monitor_context_ref()
UnitySupportTest:

UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (nautilus:1292): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (bluetooth-applet:1297): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed
dmi.bios.date: 09/23/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0905
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1005HA
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0905:bd09/23/2009:svnASUSTeKComputerINC.:pn1005HA:pvrx.x:rvnASUSTeKComputerINC.:rn1005HA:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1005HA
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
version.libdrm2: libdrm2 2.4.23-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10-1ubuntu1
version.xserver-xorg: xserver-xorg 1:7.5+6ubuntu8
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.13.2+git20110124.fadee040-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu1

[Didier Roche-Tolomelli (didrocks)]

So, sam, this is the bug I can reproduce reliably without the workaround on both my netbooks and sometimes on my laptop, depending on boot.

FYI, I reintroduced the wokaround for the week-end. Hope that + aquarius full backtrace (http://paste.ubuntu.com/559475/ for the record) will help you in your debugging :)

[Apport retracing service (apport)]

StacktraceTop:
 sn_monitor_context_ref (context=0x400001) at sn-monitor.c:159
 create_context_events_foreach (value=0x400001,
 sn_list_foreach (list=0x9153610,
 do_xmessage_event_foreach (value=0x9a00fc0, data=0x914fdd0)
 sn_list_foreach (list=0x9a01650,

[Didier Roche-Tolomelli (didrocks)]

People are getting it with the workaround as well (not on my machine) but at least rickspencer3 and seb128.

[arslan (arslansaeed)]

compiz crashed in my system as well DELL Optiplex GX270 desktop. i downloaded Alpha2 yesterday but it seems it has a lot of bugs at the moment.
when i restarted compiz it again crashed

[Adolfo Jayme Barrientos (fitojb)]

To avoid this bug, restart in "recovery mode" and select the option of low resolution. You'll be able to switch to Ubuntu Classic Desktop.