Same problems. the early 2.6.19 feisty kernel works fine, but none of the 2.6.20 kernels boot.
** Attachment added: "Info taken from Feisty running 2.6.19" http://librarian.launchpad.net/6465733/info.tgz -- [Feisty] Serial Ata drive not recognize in 2.6.20 https://launchpad.net/bugs/83313 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs