unable to unlock lock screen - ldap auth

[Fernando]

Kubuntu 12.04.4 system, unable to unlock lock screen with local user 
(not ldap account).  I can login and lock/unlock lock screen with an 
account authenticated via ldap.  With a local user I'm able to login but 
unable to unlock from lock screen.  My confs.. am I missing something?

*/etc/nsswitch.conf *
passwd:         files ldap
group:          files ldap
shadow:         files ldap
hosts:          files dns mdns
networks:       files
protocols:      db files
services:       db files
ethers:         db files
rpc:            db files
netgroup:       nis

*/etc/pam.d/common-auth *
auth    [success=2 default=ignore]      pam_unix.so nullok_secure
auth    [success=1 default=ignore]      pam_ldap.so use_first_pass
auth    requisite                       pam_deny.so
auth    required                        pam_permit.so

*/etc/pam.d/kdm*
auth       required     pam_nologin.so
auth       required     pam_env.so readenv=1
auth       required     pam_env.so readenv=1 envfile=/etc/default/locale
@include common-auth
session    required     pam_limits.so
@include common-account
@include common-password
@include common-session

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