Ironically, I tried to install some debug symbols today and also got these messages:
W: gpgv:/var/lib/apt/lists/partial/ddebs.ubuntu.com_dists_xenial_Release.gpg: The repository is insufficiently signed by key 2512191FEF8729D6E5AF414DECDCAD72428D7C01 (weak digest) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1558331 Title: message "The repository is insufficiently signed by key (weak digest)" is poorly worded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1558331/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs