samba - Aug 2004 - Problem with XP Pro clients that are inactive for some time

Hi,

My config: samba 2.2.11 on linux 2.4.26, nss_ldap 215, glibc 2.2.3.
Clients: XP Pro SP1.
It's a domain style setup with a Ldap server over ssl. The server is 
Sun DS 5.2.

Users complain that sometimes (and not on all computers) they are
unable to log in after some time (several hours) has passed since they
were last accessed. They have to reboot them and the problem
disappears.

I enabled level 3 logging and noticed those clients do not do
"\PIPE\NETLOGON" in the 3-rd transaction (what normally happens) but
instead they do "lsarpc" ("nt_open_pipe: Known pipe lsarpc
opening").
No connection to ldap server occurs. The "passdb/pdb_ldap.c" code is
not at all executed. It seems that exactly at that time users get
"no user in database" error message.

I wonder if anyone has seen it and what a workaround is.

Thanks,

-- 
Michal Kurowski
<mkur@poczta.gazeta.pl>