GDM login without using a password

[Roey Dror]

>
> OK the pam stuff that is talked about online is found in /etc/pam.d/gdm.
> I have seen a few suggestions to change the auth to optional instead of
> required.  However there would be nothing to stop some one logging in as
> root through gdm.
>

Is there any other pam module which can supply a passwordless login?
maybe pam_guest?

-- 
Roey