[K12OSN] Authentication failed: "Letters must be typed in the right case"

[john]

Hi all,

I am working on a new server that uses winbind to authenticate ltsp
clients. Suddenly I can't log in via gdm. At the greeter I type my
username and I get the following message:

"Authentication failed: Letters must be typed in right case"

I don't even have a chance to give a password. Weird.

/var/log/auth.log shows me:

Jul 16 16:08:01 mcbuntu pam_winbind[6181]: Could not retrieve user's password
Jul 16 16:08:01 mcbuntu gdm[6181]: (pam_unix) auth could not identify
password for [flyboy]
Jul 16 16:08:01 mcbuntu pam_winbind[6181]: Could not retrieve user's password
Jul 16 16:08:01 mcbuntu gdm[6181]: (pam_unix) auth could not identify
password for [flyboy]
Jul 16 16:08:02 mcbuntu gdm[6181]: Couldn't authenticate user

my /etc/pam.d/gdm file looks like:

auth    requisite       pam_nologin.so
auth    sufficient      pam_winbind.so use_first_pass
auth    sufficient      pam_unix.so nullok_secure use_first_pass
auth    required        pam_env.so
@include common-auth
@include common-account
session required        pam_limits.so
session optional pam_console.so
@include common-session
@include common-password


I can log in just fine via ssh and my pam.d/ssh file looks like:

auth       required     pam_env.so # [1]
auth       required     pam_env.so envfile=/etc/default/locale
auth       sufficient   /lib/security/pam_winbind.so
@include common-auth

account    required     pam_nologin.so
account    sufficient   /lib/security/pam_winbind.so
@include common-account

@include common-session
session    optional     pam_motd.so # [1]
session    optional     pam_mail.so standard noenv # [1]
session    required     pam_limits.so

@include common-password

I am stumped. What am I doing wrong?

Any advice would be appreciated!

TIA,

John