Dear Brain and the other folks, The upgrade was successful!
My steps were: 1) Enable proposed updated in mantic 2) Download the latest release upgrader from here https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:24.04.24 3) launch from the unpacked folder ./do-release-upgrade -p to fetch the proposed noble installer 4) Upgrade went through until the end 5) I did not remove the obsolete packages The system booted correctly and it's working so far. If you have any other request for me, please let me know. Thank you a thousand for this effort! Marco PS: I also did: cat <<EOF >/etc/apt/preferences.d/proposed-updates # Configure apt to allow selective installs of packages from proposed Package: * Pin: release a=$(lsb_release -cs)-proposed Pin-Priority: 400 EOF I don't know if it's relevant though -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2081864 Title: Cross-grades/replacements are considered replacement packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2081864/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs