Bug#542687: gnome-panel does not interact with mouse over VNC

[Rob Mahurin]

Package: gnome-panel
Version: 2.20.3-5
Severity: important

I am running GNOME under VNC.  For no obvious reason the panel has 
recently become unresponsive.  To demonstrate I make a .vnc/xstartup 
containing only 'xterm &', start a vnc session, and connect to it.
>From that xterm I can start metacity (or not), and the gnome-panel.
The panel appears but doesn't respond to clicks, and if it is obscured 
(by for instance restarting metacity, so titlebars appear) it does not 
redraw the obscured part.

Below my system information is a backtrace from running and interrupting 
under gdb, with gnome-panel-dbg installed.

What can I do to debug this?

Thanks,
Rob

-- System Information:
Debian Release: 5.0.2
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages gnome-panel depends on:
ii  gnome-about            2.22.3-2          The GNOME about box
ii  gnome-control-center   1:2.22.2.1-2      utilities to configure the GNOME d
ii  gnome-desktop-data     2.22.3-2          Common files for GNOME 2 desktop a
ii  gnome-menus            2.22.2-4          an implementation of the freedeskt
ii  gnome-panel-data       2.20.3-5          common files for the GNOME Panel
ii  libatk1.0-0            1.22.0-1          The ATK accessibility toolkit
ii  libbonobo2-0           2.22.0-1          Bonobo CORBA interfaces library
ii  libbonoboui2-0         2.22.0-1          The Bonobo UI library
ii  libc6                  2.7-18            GNU C Library: Shared libraries
ii  libcairo2              1.6.4-7           The Cairo 2D vector graphics libra
ii  libdbus-glib-1-2       0.76-1            simple interprocess messaging syst
ii  libecal1.2-7           2.22.3-1.1+lenny2 Client library for evolution calen
ii  libedataserver1.2-9    2.22.3-1.1+lenny2 Utility library for evolution data
ii  libedataserverui1.2-8  2.22.3-1.1+lenny2 GUI utility library for evolution 
ii  libgconf2-4            2.22.0-1          GNOME configuration database syste
ii  libglade2-0            1:2.6.2-1         library to load .glade files at ru
ii  libglib2.0-0           2.16.6-2          The GLib library of C routines
ii  libgnome-desktop-2     2.22.3-2          Utility library for loading .deskt
ii  libgnome-menu2         2.22.2-4          an implementation of the freedeskt
ii  libgnome2-0            2.20.1.1-1        The GNOME 2 library - runtime file
ii  libgnomeui-0           2.20.1.1-2        The GNOME 2 libraries (User Interf
ii  libgnomevfs2-0         1:2.22.0-5        GNOME Virtual File System (runtime
ii  libgtk2.0-0            2.12.12-1~lenny1  The GTK+ graphical user interface 
ii  liborbit2              1:2.14.13-0.1     libraries for ORBit2 - a CORBA ORB
ii  libpanel-applet2-0     2.20.3-5          library for GNOME Panel applets
ii  libpango1.0-0          1.20.5-5          Layout and rendering of internatio
ii  libwnck22              2.22.3-1          Window Navigator Construction Kit 
ii  libx11-6               2:1.1.5-2         X11 client-side library
ii  libxau6                1:1.0.3-3         X11 authorisation library
ii  menu-xdg               0.3               freedesktop.org menu compliant win

Versions of packages gnome-panel recommends:
ii  alacarte               0.11.5-1          easy GNOME menu editing tool
ii  evolution-data-server  2.22.3-1.1+lenny2 evolution database backend server
ii  gnome-applets          2.22.3-3          Various applets for GNOME 2 panel 
ii  gnome-icon-theme       2.22.0-1          GNOME Desktop icon theme
ii  gnome-session          2.22.3-2          The GNOME 2 Session Manager

Versions of packages gnome-panel suggests:
ii  gnome-system-tools           2.22.0-3    Cross-platform configuration utili
ii  gnome-terminal [x-terminal-e 2.22.3-3    The GNOME 2 terminal emulator appl
ii  gnome-user-guide [gnome2-use 2.22.1-1    GNOME user's guide
ii  nautilus                     2.20.0-7    file manager and graphical shell f
ii  xterm [x-terminal-emulator]  235-2       X terminal emulator
ii  yelp                         2.22.1-8+b1 Help browser for GNOME 2

-- no debconf information

mahurin at battlestar:~$ gdb gnome-panel
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show 
copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
(gdb) run
Starting program: /usr/bin/gnome-panel
[Thread debugging using libthread_db enabled]
[New Thread 0xb6db5700 (LWP 26850)]

(gnome-panel:26850): Gtk-WARNING **: gtk_widget_size_allocate(): attempt 
to allocate widget with width -19 and height 25
^C
Program received signal SIGINT, Interrupt.
[Switching to Thread 0xb6db5700 (LWP 26850)]
0xb7f90424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7f90424 in __kernel_vsyscall ()
#1  0xb75c1321 in connect () from /lib/i686/cmov/libpthread.so.0
#2  0x080a96ae in gdm_init_protocol_connection (data=0x80bcf7c)
    at panel-gdm.c:252
#3  0x080a9c40 in gdm_update_logout_actions (data=0x80bcf7c) at 
panel-gdm.c:337
#4  0x080a9dd0 in gdm_supports_logout_action (
    action=GDM_LOGOUT_ACTION_SHUTDOWN) at panel-gdm.c:351
#5  0x0808b054 in panel_action_shutdown_reboot_is_disabled ()
    at panel-action-button.c:185
#6  0x0808fff0 in panel_menu_items_create_action_item_full (
    action_type=4294966784, label=0x80bcf7c "\022", tooltip=0xbfca9bc0 
"\022")
    at panel-menu-items.c:279
#7  0x0809024c in panel_menu_items_append_lock_logout (menu=0x8758228)
    at panel-menu-items.c:1053
#8  0x08082b89 in submenu_to_display (menu=0x8758228) at menu.c:1338
#9  0x08082d7d in submenu_to_display_in_idle (data=0x8758228) at 
menu.c:1348
#10 0xb76f6291 in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x08758228 in ?? ()
#12 0x00000000 in ?? ()
(gdb)