And sure enough, this bug report has the right solution in comment #3 : https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/574232/comments/3
"Probably related to Bug #561573 and Bug #551965 Appending partman/alignment=cylinder as kernel boot parameter solved the problem for me." -- preseed Lucid with RAID and LVM fails to boot https://bugs.launchpad.net/bugs/591909 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs