kdm cannot access to openldap database

[cloc3]

I've put all my user in a openldap database, and the database is
accessible with a kerberos ticket.

but, at startup, kdm have no ticket to access openldap database, so no
users are listed in kdm userlist. in this moment the only way to have
a complete userlist is to login as root, to take a ticket with kinit
for a normal kerberos user and restart kdm.

which is the better way to solve this problem?