lightdm doesn't show remote users list

[piviul]

I have bind a pc to a samba3 domain and I have configured it to use winbind as auth backend.

All seems to works as expected (remote users can logon, wbinfo -u shows users list) except that lightdm doesn't shows domain users list at logon. Furthermore sometimes lightdm can remeber last remote user logon but sometime doesn't and the user has to write his full domain\user logon name (I have enabled greeter-show-manual-login=true in lightdm.cof).

When lighdm start I expect to see all domain users or at least last remote username logged on in the lightdm users list

Some more technical infos:

$ lsb_release -rd
Description: Ubuntu 13.04
Release: 13.04

$ apt-cache policy lightdm
lightdm:
  Installato: 1.6.0-0ubuntu2.1
  Candidato: 1.6.0-0ubuntu2.1
  Tabella versione:
 *** 1.6.0-0ubuntu2.1 0
        500 http://archive.ubuntu.com/ubuntu/ raring-updates/main i386 Packages
        100 /var/lib/dpkg/status
     1.6.0-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ raring/main i386 Packages

Have a great day

Piviul

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: lightdm 1.6.0-0ubuntu2.1
ProcVersionSignature: Ubuntu 3.8.0-23.34-generic 3.8.11
Uname: Linux 3.8.0-23-generic i686
ApportVersion: 2.9.2-0ubuntu8
Architecture: i386
Date: Tue Jun 4 14:43:21 2013
InstallationDate: Installed on 2012-04-03 (426 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: Upgraded to raring on 2013-04-29 (35 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.