Turns out the tdbbackup method was a red herring. What I am seeing though is that I can use "net ads testjoin" to rebind without having to authenticate. Running this with debug I see that the /var/run/samba/smb_krb5/krb5.conf.DOMAIN file is generated.
-- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to samba in Ubuntu. https://bugs.launchpad.net/bugs/1291951 Title: winbind loose domain join after reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1291951/+subscriptions -- 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