login in /etc/pam.d incorrect [Edgy]

could you show the diff between them? On my systems the login-file is the same in dapper and edgy, so maybe you've done your own modifications to the system?

Can you diff the "/etc/pam.d/login" files and paste the output here ?

< # PAM configuration for login
< auth requisite pam_securetty.so
< auth required pam_nologin.so
< auth required pam_env.so
< auth required pam_unix.so nulok
< account required pam_unix.so
< session required pam_unix.so
< session optional pam_lastlog.so
< password required pam_unix.so nullok obscure min=4 max=8
---
> #
> # The PAM configuration file for the Shadow `login' service
> #
>
> # 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 environment configuration file(s)
> # and also allows you to use an extended config
> # file /etc/security/pam_env.conf.
> #
> # parsing /etc/environment needs "readenv=1"
> session required pam_env.so readenv=1
> # locale variables are also kept into /etc/default/locale in etch
> # reading this file *in addition to /etc/environment* does not hurt
> session required pam_env.so readenv=1 envfile=/etc/default/locale
>
> # Standard Un*x authentication.
> @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 edit /etc/security/group.conf to fit your needs
> # (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.
> # (Replaces /etc/login.access file)
> # account required pam_access.so
>
> # Sets up user limits according to /etc/security/limits.conf
> # (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).
> #
> # This also defines the MAIL environment variable
> # However, userdel also needs MAIL_DIR and MAIL_FILE variables
> # in /etc/login.defs to make sure that removing a user
> # also removes the user's mail spool file.
> # See comments in /etc/login.defs
> session optional pam_mail.so standard
>
> # Standard Un*x account and session
> @include common-account
> @include common-session
> @include common-password

I did not make any modifications to thos...

< # PAM configuration for login
< auth requisite pam_securetty.so
< auth required pam_nologin.so
< auth required pam_env.so
< auth required pam_unix.so nulok
< account required pam_unix.so
< session required pam_unix.so
< session optional pam_lastlog.so
< password required pam_unix.so nullok obscure min=4 max=8

that is not from Ubuntu, so perhaps your system has some customizations which we can't help about.