Similar reports: https://launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/84964
Here are various logs from a system where 2.6.20-6 works but 2.6.20-8 does not boot enough to mount disks. ** Attachment added: "lspci-dmesg-version-lsmod.txt" http://librarian.launchpad.net/6464684/misc-2.6.20-6.txt -- [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