You have been subscribed to a public bug by Jan Groenewald (jan-aims):
Ubuntu 12.04
On a desktop where are our users are allowed to log in:
Feb 24 08:04:24 southafrica lightdm: pam_ldap(lightdm:auth): username changed
from Gerhard to gerhard
and the user can successfully log in even though the username was typed with an
upper case.
On a desktop where we have a restricted list of users, the list is FIRST
checked, before the case is changed, so the user cannot log in (admittedly when
typing the username "incorrectly"), even though they are in the list of allowed
users.
Feb 24 08:04:18 southafrica lightdm: pam_listfile(lightdm:auth): Refused user
Gerhard for service lightdm
Feb 24 08:04:24 southafrica lightdm: pam_unix(lightdm:auth): check pass; user
unknown
Feb 24 08:04:24 southafrica lightdm: pam_unix(lightdm:auth): authentication
failure; logname= uid=0 euid=0 tty=:0 ruser= rhost=
Feb 24 08:04:24 southafrica lightdm: pam_winbind(lightdm:auth): getting
password (0x00000388)
Feb 24 08:04:24 southafrica lightdm: pam_winbind(lightdm:auth): pam_get_item
returned a password
Feb 24 08:04:24 southafrica lightdm: pam_ldap(lightdm:auth): username changed
from Gerhard to gerhard
0 root@southafrica:/etc/pam.d#grep allow lightdm
auth required pam_listfile.so onerr=fail item=user sense=allow
file=/etc/login.user.allowed
0 root@southafrica:/etc/pam.d#grep -i gerhard /etc/login.user.allowed
gerhard
A local override is to add gerhard AND Gerhard to /etc/login.user.allowed, but
perhaps the upstream intention is to fix this typo for users.
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
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Lightdm changes case of username unless only certain users allowed
https://bugs.launchpad.net/bugs/1283957
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