wnck-applet crashed with SIGSEGV in g_type_check_instance_cast()

[bradley d]

Binary package hint: gnome-panel

there are other problems. sometimes the computer behaves well. sometimes it refreshes the screen at a framerate of about 1 f/s. sometimes pseudo-random black and white pixels fill the top part of the main screen covering most of that bar and the 'enter' key results in a complete system freeze. also, the twinview dual screen doesn't work so well, the secondary monitor sometimes only displays the center of what it should.

ProblemType: Crash
Architecture: amd64
Date: Sun Feb 14 14:06:04 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/gnome-panel/wnck-applet
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: nvidia
Package: gnome-panel 1:2.29.6-0ubuntu2
ProcCmdline: /usr/lib/gnome-panel/wnck-applet --oaf-activate-iid=OAFIID:GNOME_Wncklet_Factory --oaf-ior-fd=18
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-13.18-generic
SegvAnalysis:
 Segfault happened at: 0x7fe5a7c9de11 <g_type_check_instance_cast+49>: mov (%rdi),%rax
 PC (0x7fe5a7c9de11) ok
 source "(%rdi)" (0xaaaaaaaaaaaaaaaa) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 g_type_check_instance_cast ()
 ?? () from /usr/lib/libwnck-1.so.22
 ?? () from /usr/lib/libwnck-1.so.22
 g_main_context_dispatch ()
 ?? () from /lib/libglib-2.0.so.0
Title: wnck-applet crashed with SIGSEGV in g_type_check_instance_cast()
Uname: Linux 2.6.32-13-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (gnome-settings-daemon:1710): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1710): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:1754): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

[Apport retracing service (apport)]

StacktraceTop:
 g_type_check_instance_cast ()
 set_item_text (mi=0xb4f010,
 update_menu_state (menu=<value optimized out>)
 g_main_context_dispatch ()
 ?? () from /lib/libglib-2.0.so.0

[Pedro Villavicencio (pedro)]

Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.