Comment 71 for bug 155947

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Dustin Kirkland  (kirkland) wrote : Re: ldap config causes Ubuntu to hang at a reboot

Okay, snapshot of conclusions at this point...

(1) Any systems Feisty (and earlier) upgraded to Hardy (and later) would require a manual migration of /etc/libnss-ldap.conf and /etc/pam-ldap.conf if either or both of those files exist.

(2) None of the 5+ Ubuntu developers who have looked at this bug has successfully reproduced the "boot hang" aspect of this bug. A boot hang involves a system which is not responsive to a network ping, not responsive to banging keys, and toggling caps-lock/num-lock does not affect the associated LEDs. (That's a crude definition, of course, but some decent guidelines.) ANYONE who is able to reproduce such a boot hang, please respond and attach (a cleansed copy) of:
 * /var/log/syslog (as retrieved from a subsequent rescue boot)
 * /etc/ldap.conf
 * /etc/nsswitch.conf
 * /etc/libnss-ldap.conf
 * /etc/pam-ldap.conf

(3) We have been able to reproduce a "hang on login". I'd argue that this is a "functions as designed" scenario. If you require an LDAP server to login, and it's not available, logins should not succeed until the target LDAP server becomes available. In the case where you want to relax that requirement, a system can be configured to use a soft bind policy.

:-Dustin