Your message dated Sun, 3 Jul 2016 22:07:39 +0200
with message-id <[email protected]>
and subject line gdm has been superseded by gdm3
has caused the Debian Bug report #289641,
regarding gdm: Broken local X server disables xdmcp
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
289641: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=289641
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: gdm
Version: 2.6.0.6-1
Severity: normal

I'm not clear on why this is happening (no clues in logs), but
when the local X server keeps crashing (e.g. on a machine in a
locked room that no-one ever visits and will therefore not see
the helpful error message on the console), gdm not only disables
the starting of a session on the console, but also disables xdmcp
clients. From tethereal:

  0.000000 192.168.0.3 -> 192.168.0.255 XDMCP Broadcast_query
  2.009999 192.168.0.3 -> 192.168.0.255 XDMCP Broadcast_query
  3.535551 192.168.0.3 -> 192.168.0.1 XDMCP Query
  4.009875 192.168.0.3 -> 192.168.0.255 XDMCP Broadcast_query
  4.009898 192.168.0.3 -> 192.168.0.1 XDMCP Query

The reason for the failure to respond to queries is not logged.
Commenting out "0=Standard" in the [servers] section of gdm.conf
and restarting gdm immediately resolves the problem:

382.061415 192.168.0.3 -> 192.168.0.1 XDMCP Query
382.128748 192.168.0.1 -> 192.168.0.3 XDMCP Willing
386.264859 192.168.0.3 -> 192.168.0.1 XDMCP Query
386.265170 192.168.0.1 -> 192.168.0.3 XDMCP Willing
389.029627 192.168.0.3 -> 192.168.0.1 XDMCP Request
389.030300 192.168.0.1 -> 192.168.0.3 XDMCP Accept
389.030464 192.168.0.3 -> 192.168.0.1 XDMCP Manage

XDMCP should work independently of the local X server.

- Raz

-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.4.27-1-686-smp
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages gdm depends on:
ii  adduser              3.59                Add and remove users and groups
ii  debconf              1.4.30.11           Debian configuration management sy
ii  dpkg                 1.10.25             Package maintenance system for Deb
ii  gksu                 1.2.2-1             graphical frontend to su
ii  gnome-session        2.8.1-4             The GNOME 2 Session Manager
ii  gnome-terminal [x-te 2.8.0-2             The GNOME 2 terminal emulator appl
ii  libart-2.0-2         2.3.16-6            Library of functions for 2D graphi
ii  libatk1.0-0          1.8.0-4             The ATK accessibility toolkit
ii  libattr1             2.4.16-1            Extended attribute shared library
ii  libaudiofile0        0.2.6-5             Open-source version of SGI's audio
ii  libbonobo2-0         2.8.0-4             Bonobo CORBA interfaces library
ii  libbonoboui2-0       2.8.0-2             The Bonobo UI library
ii  libbz2-1.0           1.0.2-1             A high-quality block-sorting file 
ii  libc6                2.3.2.ds1-20        GNU C Library: Shared libraries an
ii  libcroco3            0.6.0-2             a generic Cascading Style Sheet (C
ii  libesd0              0.2.35-2            Enlightened Sound Daemon - Shared 
ii  libgconf2-4          2.8.1-4             GNOME configuration database syste
ii  libgcrypt11          1.2.0-4             LGPL Crypto library - runtime libr
ii  libglade2-0          1:2.4.1-1           Library to load .glade files at ru
ii  libglib2.0-0         2.4.8-1             The GLib library of C routines
ii  libgnome-keyring0    0.4.0-2             GNOME keyring services library
ii  libgnome2-0          2.8.0-6             The GNOME 2 library - runtime file
ii  libgnomecanvas2-0    2.8.0-1             A powerful object-oriented display
ii  libgnomeui-0         2.8.0-3             The GNOME 2 libraries (User Interf
ii  libgnomevfs2-0       2.8.3-7             The GNOME virtual file-system libr
ii  libgnutls11          1.0.16-9            GNU TLS library - runtime library
ii  libgpg-error0        1.0-1               library for common error values an
ii  libgsf-1             1.11.1-1            Structured File Library - runtime 
ii  libgtk2.0-0          2.4.14-2            The GTK+ graphical user interface 
ii  libice6              4.3.0.dfsg.1-8      Inter-Client Exchange library
ii  libjpeg62            6b-9                The Independent JPEG Group's JPEG 
ii  liborbit2            1:2.10.2-1.1        libraries for ORBit2 - a CORBA ORB
ii  libpam-modules       0.76-22             Pluggable Authentication Modules f
ii  libpam-runtime       0.76-22             Runtime support for the PAM librar
ii  libpam0g             0.76-22             Pluggable Authentication Modules l
ii  libpango1.0-0        1.6.0-3             Layout and rendering of internatio
ii  libpopt0             1.7-5               lib for parsing cmdline parameters
ii  librsvg2-2           2.8.1-2             SAX-based renderer library for SVG
ii  libselinux1          1.18-3              SELinux shared libraries
ii  libsm6               4.3.0.dfsg.1-8      X Window System Session Management
ii  libtasn1-2           0.2.10-3            Manage ASN.1 structures (runtime)
ii  libwrap0             7.6.dbs-6           Wietse Venema's TCP wrappers libra
ii  libx11-6             4.3.0.dfsg.1-8      X Window System protocol client li
ii  libxext6             4.3.0.dfsg.1-8      X Window System miscellaneous exte
ii  libxml2              2.6.11-5            GNOME XML library
ii  metacity [x-window-m 1:2.8.6-1           A lightweight GTK2 based Window Ma
ii  sawfish [x-window-ma 1:1.3+cvs20040617-7 A window manager for X11
ii  xbase-clients        4.3.0.dfsg.1-8      miscellaneous X clients
ii  xfwm4 [x-window-mana 4.0.6-1             window manager of the XFce project
ii  xlibs                4.3.0.dfsg.1-8      X Window System client libraries m
ii  xterm [x-terminal-em 4.3.0.dfsg.1-8      X terminal emulator
ii  zlib1g               1:1.2.2-3           compression library - runtime

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


--- End Message ---
--- Begin Message ---
Version: 2.20.11-4+rm

gdm was last released with Debian 6.0 (squeeze) in
February 2011 and removed from Debian sid/unstable in 2011 (see
http://bugs.debian.org/613491 for details on the removal). Since
support for squeeze and squeeze-LTS has now ended, I'm closing all the
remaining bugs reported against this package.


Andreas

--- End Message ---

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