随着更新到 19.04，我的戴尔存储库无法正常工作，因为它被标记为未签名。这是我得到的错误：
Ign:11 http://dell.archive.canonical.com/updates xenial-dell Release.gpg
W: GPG error: http://dell.archive.canonical.com/updates xenial-dell Release: Detached signature file '/var/lib/apt/lists/partial/dell.archive.canonical.com_updates_dists_xenial-dell_Release.gpg' is in unsupported binary format
E: The repository 'http://dell.archive.canonical.com/updates xenial-dell Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
我试过xenial-dell和bionic-dell。您可以在此处查看所有存储库。
两个存储库中都有 Release 和 Release.gpg 文件：
我已经在 Ask Ubuntu 和其他地方进行了搜索，但找不到可行的解决方案。