[Samba] issues with printing

[Tom Ryan]

We have recently started having an odd problem with printing via samba (3.6.1). Samba is joined via security = ads to our domain. We do not use winbind on this system. Our account usernames are provided via openldap.

User starts system (generally windows 7 64bit, but we've seen it on 32bit windows 7 and XP), sometimes they can print, sometimes they can't. If they reboot, they can almost always print.

I've turned the logging up to level 3 and have noticed repeated errors like

[2012/01/04 09:10:32.252107,  2] auth/auth.c:319(check_ntlm_password)
  check_ntlm_password:  Authentication for user [MACHINENAME$] -> [MACHINENAME$] FAILED with error NT_STATUS_NO_SUCH_USER
[2012/01/04 09:10:32.252212,  3] smbd/error.c:81(error_packet_set)
  error packet at smbd/sesssetup.c(124) cmd=115 (SMBsesssetupX) NT_STATUS_LOGON_FAILURE

Which I suspect has to do with the lack of winbind and not having machine names in our ldap service.

I should note that this all worked perfectly up until a few weeks ago and then just started breaking randomly.. Isn't that always the case?

I appreciate any pointers.

Thanks.

Tom