You have been subscribed to a public bug: Since apt-key is now deprecated, I followed various guides and moved all third-party repository keys to /etc/apt/keyrings/, then added the "signed-by" tag to the corresponding source lists. After that, those third-party repositories no longer show up in the "Other Software" tab in Software Updater.
/home/jing>lsb_release -rd Description: Ubuntu 22.04.1 LTS Release: 22.04 /home/jing>apt-cache policy update-manager update-manager: Installed: 1:22.04.9 Candidate: 1:22.04.9 Version table: *** 1:22.04.9 500 500 http://archive.ubuntu.mirror.rafal.ca/ubuntu jammy/main amd64 Packages 500 http://archive.ubuntu.mirror.rafal.ca/ubuntu jammy/main i386 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: update-manager 1:22.04.9 ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39 Uname: Linux 5.15.0-46-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu82.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Mon Aug 22 18:27:09 2022 InstallationDate: Installed on 2018-10-23 (1399 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) PackageArchitecture: all SourcePackage: update-manager UpgradeStatus: Upgraded to jammy on 2022-08-21 (1 days ago) ** Affects: software-properties (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug jammy -- Software Updater not showing third-party repository with "signed-by" tag https://bugs.launchpad.net/bugs/1987353 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to software-properties in Ubuntu. -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp