compiz crashed with SIGSEGV in g_atomic_int_get()

[Rachel Greenham]

will ad more: am tapping this with charmap!

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: libnux-0.9-0 0.9.28-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-5.32-generic 2.6.38-rc6
Uname: Linux 2.6.38-5-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Feb 26 13:34:45 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fdf81ba60c3 <g_atomic_int_get+3>: mov (%rdi),%eax
 PC (0x7fdf81ba60c3) ok
 source "(%rdi)" (0x00000020) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 g_atomic_int_get () from /lib/libglib-2.0.so.0
 g_bit_lock () from /lib/libglib-2.0.so.0
 g_variant_ref_sink () from /lib/libglib-2.0.so.0
 g_variant_new_strv () from /lib/libglib-2.0.so.0
 g_settings_set_strv () from /usr/lib/libgio-2.0.so.0
Title: compiz crashed with SIGSEGV in g_atomic_int_get()
UserGroups: adm admin cdrom dialout disk lpadmin plugdev sambashare

[Rachel Greenham (rachel-strangenoises)]

... And I have my keyboard back!

After the upgrade to natty I uninstalled now-local package mediainfo, but this had been added into my unity launcher bar (automatically). So after mediainfo was gone that button was just a grey-boxed "?".

I attempted to remove it by right-click, uncheck "Keep in Launcher".

The desktop froze for a few seconds (maybe as much as a minute; then the window manager died, taking with it the top panel and the unity launcher and the window furniture. And apport offered up this bug to submit.

And keyboard entry wouldn't work; hence logging into launchpad and entering the original report using the Character Map application and promising more here!

NB: Keyboarding ctrl-alt-F1 to get to console 1 to restart gdm *did* work, but any text entry into the desktop didn't.

[Apport retracing service (apport)]

StacktraceTop:
 g_atomic_int_get (atomic=0x20) at /build/buildd/glib2.0-2.28.1/./glib/gatomic-gcc.c:64
 g_bit_lock (address=0x20, lock_bit=<value optimized out>) at /build/buildd/glib2.0-2.28.1/./glib/gbitlock.c:211
 g_variant_ref_sink (value=0x0) at /build/buildd/glib2.0-2.28.1/./glib/gvariant-core.c:687
 g_variant_new_strv (strv=0x7fffd15532e0, length=19) at /build/buildd/glib2.0-2.28.1/./glib/gvariant.c:1353
 g_settings_set_strv (settings=0x1b47050, key=0x7fdf71fc0560 "favorites", value=<value optimized out>) at /build/buildd/glib2.0-2.28.1/./gio/gsettings.c:1977