This is actually not a bug. As of openssh (1:4.1p1-5), to close Debian bug #314956, btmp logging was turned off. If you want that re-enabled, please open a Debian bug.
** Changed in: openssh (Ubuntu) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/743858 Title: sshd not appending to /var/log/btmp -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs