Thanks. I was able to re-produce this using your sources. The problem is that you have a mix of .sources and .list PPAs enabled, and since there are at least _some_ .list still present, the upgrader expects Ubuntu sources to be present in a .list file (even though they are already found in /etc/apt/sources.list.d/ubuntu.sources).
So, this is clearly a bug in ubuntu-release-upgrader. But, as a workaround, you should be able to either (a) temporarily remove your /etc/apt/sources.list.d/*.list files, or (b) convert them to .sources. The upgrade should work after that. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Incomplete => Opinion ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Opinion => Confirmed ** Changed in: ubuntu-release-upgrader (Ubuntu) Assignee: (unassigned) => Nick Rosbrook (enr0n) ** Tags added: foundations-todo -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062042 Title: "No valid sources.list entry found" and "An upgrade might not succeed" when running "sudo do-dist-upgrade -d" on Ubuntu 23.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2062042/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs