On an asus p5b I was able to install today's AMD 64 alternate with the following settings.
-ACPI enabled -AHCI mode for the JMICRON SATA Connector After install I recieved a GRUB error 21 and had a mess of trouble but if these settings help then good luck to you. -- JMicron PATA/SATA Controller does not work https://launchpad.net/bugs/57502 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs