This error message is shown not to alert users, but rather make users report these issues to the distributor, as this particular issue means the distributor has a mistake in their metadata somewhere. In this case it's not Ubuntu's fault directly, but rather GNOME Software injecting invalid metadata. This is fixed upstream with commit https://gitlab.gnome.org/GNOME/gnome-software/commit/7c1620990b6361fac370b76c9828f8f77ff77a72 which should land in the next Ubuntu release naturally (but may be cherry-picked to make this issue go away even sooner).
** Changed in: appstream (Ubuntu) Status: Confirmed => Invalid ** Also affects: gnome-software (Ubuntu) Importance: Undecided Status: New ** Changed in: gnome-software (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to appstream in Ubuntu. https://bugs.launchpad.net/bugs/1861631 Title: "The AppStream system cache was updated, but some components were ignored. Refer to the verbose log for more information." Status in appstream package in Ubuntu: Invalid Status in gnome-software package in Ubuntu: Triaged Bug description: `apt-get update` and the nightly `apticron --cron` job are reporting: "The AppStream system cache was updated, but some components were ignored. Refer to the verbose log for more information." This is pretty much meaningless to most people who have no idea what AppStream is and what "verbose log" is being referred to. I dug around and managed to discover `appstreamcli refresh-cache --force --verbose`, whose output is attached. I don't know what the "bad" output is or how to fix it. All I know is that I hope Focal isn't going to be generating this message when it ships, because it isn't going to make sense to most people and most people won't know how to fix it and it causes annoying emails from apticron every night. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: appstream 0.12.10-1 ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8 Uname: Linux 5.4.0-12-generic x86_64 ApportVersion: 2.20.11-0ubuntu16 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Feb 2 16:01:24 2020 InstallationDate: Installed on 2019-08-16 (170 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) SourcePackage: appstream UpgradeStatus: Upgraded to focal on 2020-01-31 (2 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appstream/+bug/1861631/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp