error login

[chechu chechu <chechuironman@hotmail.com>]

hola¡
He actualizado mi debian stable  a unstable, pero la actualizarlo no se
que ha pasao...pero al logearme solo puedo hacerlo como root o los
usuarios registrados en la maquina local(tengo un servidor ldap que
funciona en esa maquina), pero ese no es el problema sino que cuando
loggeo como root por ejemplo parece que va iniciar todo bien salen los
mensajes de bienvenida y demas ...pero vuelve  a aparecer el
logging ...asi todo el rato se mete en un bucle...nunca llega al
prompt...yo creo que es algo del pam pero no he conseguido nada...os
adjunto mis archivos de conf pam (en la stable funcionaban):

/etc/pam.d/login


#
# The PAM configuration file for the Shadow `login' service
#
# NOTE: If you use a session module (such as kerberos or NIS+)
# that retains persistent credentials (like key caches, etc), you
# need to enable the `CLOSE_SESSIONS' option in /etc/login.defs
# in order for login to stay around until after logout to call
# pam_close_session() and cleanup.
#

# Outputs an issue file prior to each login prompt (Replaces the
# ISSUE_FILE option from login.defs). Uncomment for use
# auth       required   pam_issue.so issue=/etc/issue

# Disallows root logins except on tty's listed in /etc/securetty
# (Replaces the `CONSOLE' setting from login.defs)
auth       requisite  pam_securetty.so

# Disallows other than root logins when /etc/nologin exists
# (Replaces the `NOLOGINS_FILE' option from login.defs)
auth       requisite  pam_nologin.so

# This module parses /etc/environment (the standard for setting
# environ vars) and also allows you to use an extended config
# file /etc/security/pam_env.conf.
# (Replaces the `ENVIRON_FILE' setting from login.defs)
auth       required   pam_env.so

# Standard Un*x authentication. The "nullok" line allows passwordless
# accounts.
@include common-auth

# This allows certain extra groups to be granted to a user
# based on things like time of day, tty, service, and user.
# Please uncomment and edit /etc/security/group.conf if you
# wish to use this.
# (Replaces the `CONSOLE_GROUPS' option in login.defs)
# auth       optional   pam_group.so

# Uncomment and edit /etc/security/time.conf if you need to set
# time restrainst on logins.
# (Replaces the `PORTTIME_CHECKS_ENAB' option from login.defs
# as well as /etc/porttime)
# account    requisite  pam_time.so

# Uncomment and edit /etc/security/access.conf if you need to
# set access limits.

# set access limits.
# (Replaces /etc/login.access file)
# account  required       pam_access.so

# Standard Un*x account and session
@include common-account
@include common-session

# Sets up user limits, please uncomment and
read /etc/security/limits.conf
# to enable this functionality.
# (Replaces the use of /etc/limits in old login)
session    required   pam_limits.so

# Prints the last login info upon succesful login
# (Replaces the `LASTLOG_ENAB' option from login.defs)
session    optional   pam_lastlog.so

# Prints the motd upon succesful login
# (Replaces the `MOTD_FILE' option in login.defs)
session    optional   pam_motd.so

# Prints the status of the user's mailbox upon succesful login
# (Replaces the `MAIL_CHECK_ENAB' option from login.defs). You
# can also enable a MAIL environment variable from here, but it
# is better handled by /etc/login.defs, since userdel also uses
# it to make sure that removing a user, also removes their mail
# spool file.
session    optional   pam_mail.so standard noenv
@include common-password


/etc/pam.d/common-session

session required        pam_limits.so
session required        pam_unix.so
session optional        pam_ldap.so
session required        pam_mkhomedir.so skel=/etc/skel/ umask=0022

/etc/pam.d/common-account

account required          pam_unix.so
account sufficient        pam_ldap.so

/etc/pam.d/common-auth


auth     sufficient     pam_unix.so
auth     sufficient     pam_ldap.so try_first_pass
auth     required       pam_env.so
auth     required       pam_securetty.so
auth     required       pam_unix_auth.so
auth     required       pam_warn.so
auth     required       pam_deny.so


/etc/pam.d/common-password

password required       pam_cracklib.so retry=3 minlen=8 difok=4
password sufficient     pam_unix.so use_authtok md5 shadow
password sufficient     pam_ldap.so use_authtok
password required       pam_warn.so
password required       pam_deny.so