Bug#555505: segfault in gdm on first login

Tue Nov 10 02:35:43 UTC 2009

Package: gdm
Version: 2.20.10-1
Severity: important

This may be related to http://bugs.debian.org/480469 as well....

The first time I login with GDM I get a black screen followed by a 
re-display of the GDM login prompt. Thereafter login works. I am seeing 
this in syslog at the time of the GDM failure:

acpid: client connected from 2278[0:0]
acpid: 1 client rule loaded
kernel: [  179.880427] gdm[2271]: segfault at bfe61a85 ip b75a72da sp 
bfbee680 error 4 in libc-2.10.1.so[b7534000+141000]
gdm[2270]: WARNING: gdm_cleanup_children: child 2271 crashed of signal 
11
gdm[2270]: WARNING: gdm_cleanup_children: Slave crashed, killing its 
children
kernel: [  180.262494] mtrr: no MTRR for e0000000,800000 found
acpid: client 2278[0:0] has disconnected
acpid: client connected from 3766[0:0]
acpid: 1 client rule loaded

I happen to have two thinkpads with a very similar software 
configuration. this x24 is exhibiting the bug behavior, the other a21m 
is not. The only really significant difference between the two machines 
is that the buggy machine has an encrypted home directory that is 
mounted automatically by libpam-mount. This is my setup:

http://blog.langex.net/index.cgi/Linux/encryption/encrypted-directory-on-login.html

I am also experiencing another login-related bug on the same machine, 
also not showing on the machine that is not using libpam-mount:
http://bugs.debian.org/555105

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.30-2-686 (SMP w/1 CPU core)
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 gdm depends on:
ii  adduser              3.111               add and remove users and groups
ii  debconf [debconf-2.0 1.5.28              Debian configuration management sy
ii  fluxbox [x-window-ma 1.1.1-2             Highly configurable and low resour
ii  gksu                 2.0.2-2+b1          graphical frontend to su
ii  gnome-session [x-ses 2.26.2-1            The GNOME Session Manager
ii  gnome-terminal [x-te 2.28.1-1            The GNOME terminal emulator applic
ii  kde-window-manager [ 4:4.3.1-1           the KDE 4 window manager (KWin)
ii  konsole [x-terminal- 4:4.3.1-1           X terminal emulator for KDE 4
ii  libart-2.0-2         2.3.20-2            Library of functions for 2D graphi
ii  libatk1.0-0          1.28.0-1            The ATK accessibility toolkit
ii  libattr1             1:2.4.44-1          Extended attribute shared library
ii  libc6                2.10.1-5            GNU C Library: Shared libraries
ii  libcairo2            1.8.8-2             The Cairo 2D vector graphics libra
ii  libdbus-1-3          1.2.16-2            simple interprocess messaging syst
ii  libdbus-glib-1-2     0.82-2              simple interprocess messaging syst
ii  libdmx1              1:1.0.2-3           X11 Distributed Multihead extensio
ii  libfontconfig1       2.6.0-4             generic font configuration library
ii  libfreetype6         2.3.11-1            FreeType 2 font engine, shared lib
ii  libglade2-0          1:2.6.4-1           library to load .glade files at ru
ii  libglib2.0-0         2.22.2-2            The GLib library of C routines
ii  libgnomecanvas2-0    2.26.0-1            A powerful object-oriented display
ii  libgtk2.0-0          2.18.3-1            The GTK+ graphical user interface 
ii  libpam-modules       1.1.0-4             Pluggable Authentication Modules f
ii  libpam-runtime       1.1.0-4             Runtime support for the PAM librar
ii  libpam0g             1.1.0-4             Pluggable Authentication Modules l
ii  libpango1.0-0        1.26.0-1            Layout and rendering of internatio
ii  librsvg2-2           2.26.0-1            SAX-based renderer library for SVG
ii  librsvg2-common      2.26.0-1            SAX-based renderer library for SVG
ii  libselinux1          2.0.87-3            SELinux runtime shared libraries
ii  libwrap0             7.6.q-18            Wietse Venema's TCP wrappers libra
ii  libx11-6             2:1.2.2-1           X11 client-side library
ii  libxau6              1:1.0.5-1           X11 authorisation library
ii  libxdmcp6            1:1.0.2-3           X11 Display Manager Control Protoc
ii  libxext6             2:1.0.4-1           X11 miscellaneous extension librar
ii  libxi6               2:1.2.1-2           X11 Input extension library
ii  libxinerama1         2:1.0.3-2           X11 Xinerama extension library
ii  libxml2              2.7.6.dfsg-1        GNOME XML library
ii  lsb-base             3.2-23              Linux Standard Base 3.2 init scrip
ii  lxsession [x-session 0.3.8+svn20090521-1 a lightweight X11 session manager
ii  lxterminal [x-termin 0.1.6-1             desktop independent vte-based term
ii  metacity [x-window-m 1:2.28.0-1          lightweight GTK+ window manager
ii  mrxvt [x-terminal-em 0.5.4-1             lightweight multi-tabbed X termina
ii  openbox [x-window-ma 3.4.7.2-5           standards compliant, fast, light-w
ii  rxvt [x-terminal-emu 1:2.6.4-14          VT102 terminal emulator for the X 
ii  rxvt-ml [x-terminal- 1:2.6.4-14          multi-lingual VT102 terminal emula
ii  xterm [x-terminal-em 250-1               X terminal emulator

Versions of packages gdm recommends:
ii  dialog                    1.1-20080819-1 Displays user-friendly dialog boxe
ii  gdm-themes                0.6.2          Themes for the GNOME Display Manag
ii  whiptail                  0.52.10-4.1    Displays user-friendly dialog boxe
ii  xserver-xephyr            2:1.6.5-1      nested X server
ii  xserver-xorg              1:7.4+4        the X.Org X server
ii  zenity                    2.28.0-1       Display graphical dialog boxes fro

Versions of packages gdm suggests:
ii  libpam-gnome-keyring          2.28.1-1   PAM module to unlock the GNOME key
ii  locales                       2.10.1-5   GNU C Library: National Language (
ii  pm-utils                      1.2.5-4    utilities and scripts for power ma

-- debconf information:
  gdm/daemon_name: /usr/bin/gdm
* shared/default-x-display-manager: gdm