Saya menggunakan OS windows 7 pro dengan logon domain ke samba PDC+LDAP
(active directory). Selama ini jika nama user mempunyai jumlah karakter 
< 20 bisa logon domain dengan sukses ke samba PDC.

Masalahnya jika username lebih dari 20 karakter akan gagal logon domain.
Logon domain di windows 7 berlangsung cukup lama kemudian muncul tulisan:

"The Local Session Manager service failed the logon.
The data area passed to a system call is too small."

Namun Log di samba memperlihatkan autentikasi untuk user tersebut sukses:

[2011/11/10 14:05:36,  3] auth/auth.c:271(check_ntlm_password)
  check_ntlm_password: sam authentication for user [account.more.20.characters] 
succeeded
[2011/11/10 14:05:36,  3] smbd/sec_ctx.c:210(push_sec_ctx)
  push_sec_ctx(99, 99) : sec_ctx_stack_ndx = 1
[2011/11/10 14:05:36,  3] smbd/uid.c:428(push_conn_ctx)
  push_conn_ctx(100) : conn_ctx_stack_ndx = 0
[2011/11/10 14:05:36,  3] smbd/sec_ctx.c:310(set_sec_ctx)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1
[2011/11/10 14:05:36,  3] smbd/sec_ctx.c:418(pop_sec_ctx)
  pop_sec_ctx (99, 99) - sec_ctx_stack_ndx = 0
[2011/11/10 14:05:36,  2] auth/auth.c:310(check_ntlm_password)
  check_ntlm_password:  authentication for user [account.more.20.characters] ->
+[account.more.20.characters] -> [account.more.20.characters] succeeded

Ada rekan-rekan yang pernah mengalami hal ini? 
Mohon pencerahan.

TIA


-- 
Arief Yudhawarman
http://awarmanf.wordpress.com

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