same dell optiplex d755 same issue, I didn't see anything in dmesg or journalctrl of note
** Attachment added: "~/.cache/calamares/session.log" https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1864787/+attachment/5331848/+files/session.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1864787 Title: Lubuntu failed install "sfdisk --force --append /dev/sda" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calamares/+bug/1864787/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs