kern/53481: 5.1R does not recognise xl0 at every startup

[Oliver Fischer]

 > Does FreeBSD 4.8 work on this system?  Does 5.1 work if you
 > disable ACPI during the boot process?

I ran 4.8 before I switched to 5.1 and xl0 was working fine. Disabling 
ACPI doesn't help.