Screen Lock rejects password

[Scott J. Henson]

Peter Cockriell wrote:

> Hello all,
>
> This is my first Ubuntu install (v5.10) and first time administering a 
> linux system, though I've been a *nix user for many years.  My install 
> went absolutely peachy and everything configured properly on the first 
> go.
>
> Today I setup Kerberos v.5, Samba & Winbind in order to share files to 
> users in a Windows 2003 Server domain.   That went fine and I acquired 
> a lease (kinit) from the domain server fine.  I had to leave my desk 
> for a moment so I locked my screen ... and now it's rejecting my 
> password.  Anyone have any thoughts on this?  I know I can reset the 
> password through grub, but I'd prefer to understand why this has 
> happened and how I can prevent the problem.


I would think that somewhere along the way kerberos got added to your 
/etc/pam.d/common-auth file or some such.  And now you can't 
authenticate against the credentials properly.  I haven't installed 
kerberos in a long while, but its entirely possible that that happened.  
I would login via single user mode(the repair console at the grub 
prompt) and check everything under /etc/pam.d/ to make sure 
kerberos(pam_ldap I think) didn't sneak in there some how.  I shouldn't 
have but thats my thought.  Also maybe pam_smb or some such.  Ive never 
done samba auth through pam so I have no clue on that one.