Same problem with a USB attached IDE hard disk. And acpi=off didn't fix it.
Machine is SHUTTLE XPC ST20G5 with nVidia nForce chipset and AMD CPU. Running in 32 bit mode. -- Unlink after no-IRQ https://launchpad.net/bugs/24925 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
