Bug#617208: Fails if started by init

[Sven Joachim <svenjoac@gmx.de>]

Package: xdm
Version: 1:1.1.10-3
Severity: important

This morning I found myself at the console rather than at the XDM login
prompt, with the following messages in /var/log/xdm.log:

,----
| Mon Mar  7 07:50:32 2011 xdm error (pid 1285): Unknown session exit code 2816 from process 1463
| Mon Mar  7 07:50:33 2011 xdm info (pid 1285): Exiting
`----

XDM had worked fine up to yesterday, and I'm really at a loss here.
Some observations:

- Manually running "/etc/init.d/xdm start" works.

- In my setup, I stop xdm in runlevel 2 and start it in runlevels 3-5,
  with runlevel 3 being the default.  Running "init 2; init 3"
  reproduces the above failure.

- Downgrading cpp to version 4:4.4.5-2 makes no difference, and other
  packages upgraded/installed/removed yesterday do not seem to have any
  relationship to xdm.


-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (101, 'experimental')
Architecture: i386 (x86_64)

Kernel: Linux 2.6.38-rc7-nouveau+ (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages xdm depends on:
ii  cpp                           4:4.5.2-1  The GNU C preprocessor (cpp)
ii  debconf [debconf-2.0]         1.5.38     Debian configuration management sy
ii  libc6                         2.11.2-11  Embedded GNU C Library: Shared lib
ii  libpam0g                      1.1.2-2    Pluggable Authentication Modules l
ii  libselinux1                   2.0.96-1   SELinux runtime shared libraries
ii  libx11-6                      2:1.4.1-5  X11 client-side library
ii  libxau6                       1:1.0.6-1  X11 authorisation library
ii  libxaw7                       2:1.0.9-2  X11 Athena Widget library
ii  libxdmcp6                     1:1.1.0-1  X11 Display Manager Control Protoc
ii  libxext6                      2:1.2.0-2  X11 miscellaneous extension librar
ii  libxft2                       2.2.0-2    FreeType-based font drawing librar
ii  libxinerama1                  2:1.1.1-1  X11 Xinerama extension library
ii  libxmu6                       2:1.1.0-1  X11 miscellaneous utility library
ii  libxpm4                       1:3.5.9-1  X11 pixmap library
ii  libxrender1                   1:0.9.6-1  X Rendering Extension client libra
ii  libxt6                        1:1.1.0-1  X11 toolkit intrinsics library
ii  lsb-base                      3.2-27     Linux Standard Base 3.2 init scrip
ii  procps                        1:3.2.8-10 /proc file system utilities
ii  x11-common                    1:7.6+4    X Window System (X.Org) infrastruc
ii  x11-utils                     7.6+1      X11 utilities
ii  x11-xserver-utils             7.6+1      X server utilities

xdm recommends no packages.

xdm suggests no packages.

-- Configuration Files:
/etc/X11/xdm/Xservers changed:
:0 local /usr/bin/X :0 vt7 -dpi 100 -nolisten tcp

/etc/X11/xdm/Xsetup changed:
xsetroot -solid blue

/etc/logrotate.d/xdm changed:
/var/log/xdm.log {
    weekly
    rotate 10
    compress
    delaycompress
    notifempty
    missingok
    postrotate
        if [ -r /var/run/xdm.pid ]; then \
            kill -s USR2 $(cat /var/run/xdm.pid); \
        fi
    endscript
}


-- debconf information:
  xdm/stop_running_server_with_children: true
  xdm/daemon_name: /usr/bin/xdm
* shared/default-x-display-manager: xdm