One strange thing I see in Mainlog.txt is that the canonical-kernel-team PPA was disabled and then enabled. This could be because I wanted to use my local mirror of the archive but that's not clear to me.
2024-04-16 12:54:58,962 DEBUG examining: 'deb https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu/ mantic main' 2024-04-16 12:54:58,963 DEBUG entry '# deb https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu/ noble main # disabled on upgrade to noble' was disabled (unknown mirror) ... 2024-04-16 12:55:03,507 DEBUG examining: 'deb https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu/ mantic main' 2024-04-16 12:55:03,507 DEBUG verifySourcesListEntry: deb https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu/ noble main 2024-04-16 12:55:03,507 DEBUG url_downloadable: https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu//dists/noble/Release 2024-04-16 12:55:03,507 DEBUG s='https' n='ppa.launchpadcontent.net' p='/canonical-kernel-team/bootstrap/ubuntu//dists/noble/Release' q='' f='' 2024-04-16 12:55:03,947 DEBUG entry 'deb https://ppa.launchpadcontent.net/canonical-kernel-team/bootstrap/ubuntu/ noble main' updated to new dist -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2061923 Title: my upgrade to noble went up in flames To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2061923/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs