the problem seems to be related only to pam_winbind not directly to lightdm. Also gdm does not allows the login. I attached a grep of syslog file kept after inserting username and password on gdm. Gdm hangs showing me "your password will expire in 12 days".
** Attachment added: "grep '12:04:09' syslog" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1003296/+attachment/3203411/+files/gdmcrash.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003296 Title: lightdm crashed with SIGSEGV in _pam_winbind_change_pwd() when password is expiring To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1003296/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs