Just hit this bug in Kubuntu 16.04. Removing some old gpg files seems to have fixed it
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1263540 Title: Apt-get reports NO_PUBKEY gpg error for keys that are present in trusted.gpg. To manage notifications about this bug go to: https://bugs.launchpad.net/apt/+bug/1263540/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
