First off, edit /boot/grub/menu.lst and remove the line that starts "# kopt_2_6 = root...", then run "sudo update-grub".
Then retest against 2.6.20 aswell. ** Changed in: linux-source-2.6.19 (Ubuntu) Sourcepackagename: linux-source-2.6.19 => linux-source-2.6.20 Status: Unconfirmed => Needs Info -- ata2 timeouts, fails to boot https://launchpad.net/bugs/74059 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs