Thanks Julian for reviewing. I now have installed package ubuntu-dbgsym-keyring and /usr/share/keyrings/ubuntu-dbgsym-keyring.gpg works. So setting the bug to invalid for ubuntu-keyring is correct.
But Why shouldn't we improve of the user experience of add-apt- repository? Add-apt-repository creates a "modern" sources file for PPAs including adding the key. Why doesn't it do the same for any archive? Here is an example: sudo add-apt-repository --ppa xypron/qemu gives me: $ cat /etc/apt/sources.list.d/xypron-ubuntu-qemu-questing.sources Types: deb URIs: https://ppa.launchpadcontent.net/xypron/qemu/ubuntu/ Suites: questing Components: main Signed-By: -----BEGIN PGP PUBLIC KEY BLOCK----- . mQINBGD43z0BEADRRK0wGSDIb1YKqePS4UA7eBIosOmtyYK/+0l1i0YelFiKTL6z QlSdRHKyeWdkQuetKajJlZukuEoV5q86txByGBTK5ACycLbOWID0kswqMD17PTL9 CHiKeH/MGgBZbKc/JA/lD9DS1uLvbCtzHlHRhJkfgoFI901QqFECrhkTlU+3kazx d7yz4d2Aiv5Gq0xTS1ZwIoCiGi560MkiOZC6byLyK8Pih7NVxkzZJPgf88EBjDON zj2hqlNNqbaWkkN1aRxPlc0DH62qkKoNKlg4QiwtI01TCFyVuKQ6SNpsuJagOOvI jH8h3xAthNDfabOcI3krUC8N+mSGEu95U6Ws+QwQ1WCciWzq55WAkm2P4ZMGBgmf Gqxq75syVYKnhPEH8QKFbdjWOIfGWIO46UhkUxgDnq83xBQ672i5+t6ubsEVjp06 qVXdvPmoeHa5mSKTJqsTc5JvoOeyanDtyNmd6WBBIWcHzVX5z6hSdnZ+sYeu3W5p 14a3bZf4rLkyBS0Pyr72wZ1x6Etd0hMcx9dD9PDKitBUJWmKf1+ajyTr9dRMNW88 1jfTOQ1KIUDY3wDgJRHt4vYtep96c+Hh7edRjdWvMx1hzUZgVJDkV4NazpTXli5T hlbKgkOcxibqhfj23B+bCFnusCQ2JKK3IeWGYUYOaq0O5N1ZWoYm0433SwARAQAB tCVMYXVuY2hwYWQgUFBBIGZvciBIZWlucmljaCBTY2h1Y2hhcmR0iQJOBBMBCgA4 FiEEe7bv/cf9G01sBcaepxSs8Yn+yKoFAmD43z0CGwMFCwkIBwIGFQoJCAsCBBYC AwECHgECF4AACgkQpxSs8Yn+yKoH1RAAqYnBu+qSQ/n6xgTHObi8CUMUNl4WgNGK mcj8Mm2CKZHlqYTXeoKq0cLY9+jZPbaVC3fo2YFJT9REb4+6nZlALT5vy5ETMbR7 Kaxn1496kPa8XMPMkjqJrL8QF0C37pVhDMeqUekA6Qo9bfauHvjw/6A4gyKKe4NM WIvq9FCxx6L9T1dZyHauPbtGG0t0+BJNTjOmTc4gLLyVWy5xgsmwOxx1vQRNb7FY OPNf0FPk715QW5wRi5vk4fYQStQ60tigd3dF1elchqyixcz5ncfmZQQ77YCkPoGT c1hyG5NG3HpXQ3uu9F8s00lG6NZ/wYvJe0NlQv3WAsPvbxRcJG26e1xQSvJvqJq3 JMVAu954sqnyQkuX5QOaQ4O2oUVLm33ZOli78hiVdIFxks/7kxm2eJxo2teqj9ED Cr0d5UkHyy/JXEEmp/6dnMzuc4P4Bil/wad4xEXMykHhsd7Q4hJwAiNkoCzkLNAI UwcjdiuZ2+tPEUjii+XXXwWf8QMI/4k6tmPMmqY8pT7NoX4PLs6jMb7HIPM+M/2f x/KXbO+UBw7zTIn1OWSxF5smowSbUnEqIq3awKUUJPs9PmbdnjTYqErWgWLG5B2s RPn0AJgSwbifshpszDR+EJ0RpjmXfiE4eDAPWeT8TO5Vc0mrQKew6xI3qPVRk2ce h0PpbELFE3s= =x1H2 -----END PGP PUBLIC KEY BLOCK----- ** Changed in: software-properties (Ubuntu) Status: Invalid => New ** Changed in: software-properties (Ubuntu) Importance: Undecided => Wishlist -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2127964 Title: C8CAB6595FDFF622 used by http://ddebs.ubuntu.com/ is missing in ubuntu-keyring To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/2127964/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
