It fixed the problem. I think you must change something in /etc/pam.d, probably common-auth, because PAM replaces login.defs (man pam) but I don't know what you should write.
-- unknown item 'FAIL_DELAY' https://launchpad.net/bugs/73024 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
