Workaround : As mentioned by A (zorn-v), the culprit is the (deprecated) file /etc/apt/sources.list Populating with a minimal content :
deb http://fr.archive.ubuntu.com/ubuntu mantic main deb http://fr.archive.ubuntu.com/ubuntu mantic universe allows the installation to continue, with a ton of warnings about duplicate origins, that you should ignore -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2047447 Title: No valid source.list found while upgrading from mantic to noble To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2047447/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
