A user reported, I have the following PAM configuration :

auth required /lib/security/pam_securetty.so
auth sufficient /lib/security/pam_winbind.so
auth sufficient /lib/security/pam_unix.so use_first_pass nullok
auth required /lib/security/pam_stack.so service=system-auth
auth required /lib/security/pam_nologin.so
account required /lib/security/pam_stack.so service=system-auth
account required /lib/security/pam_winbind.so
password required /lib/security/pam_stack.so service=system-auth

When I open a new console with [ctrl][alt][F1], I can't log in with my user “pitie.” I have tried with user “scienceu\pitie” also.

The problem may lie with the inclusion of pam_stack.so service=system-auth . That file often contains a lot of stuff that may duplicate what you are already doing. Try commenting out the pam_stack lines for auth and account and see if things work. If they do, look at /etc/pam.d/system-auth and copy only what you need from it into your /etc/pam.d/login file. Alternatively, if you want all services to use Winbind, you can put the Winbind-specific stuff in /etc/pam.d/system-auth.