It happens here too! It was very difficult to find why I can't login in a big upgrade. There is no log anywhere related to smb. Removing libpam-smbpass solved the problem.
- Bug#799840: libpam-smbpass: installed libpam-smb... Adilson dos Santos Dantas
- Bug#799840: libpam-smbpass: installed libpa... Facundo Aguilera
