John Baldwin wrote:
> On Nov 29, 2005, at 10:50 PM, David Kelly wrote:
>> On Nov 29, 2005, at 5:10 PM, Alex Zbyslaw wrote:
>>> David Kelly wrote:
>>>> Could I
>>>> boot a 5.4 CDROM to test ACPI?
>>> Yes you could. I did this the other day on a machine that doesn't
>>> even have a disk yet ;-) acpidump is there. Select fixit then live
>>> file system (if memory serves) but you probably knew that !
>> Problem solved, but I've been working on it too hard not to share the
>> story which might be useful:
>> Without hw.physmem="2G" its now finding the full memory load so I
>> don't know what was happening previously.
> Actually, this is the second report I've had that setting hw.physmem
> interacts badly with ACPI. The other report I had resulted in a kernel
> panic if it was set to 3G.
I suspect mapping the memory to read the FACS is failing for the
hw.physmem case. His machine probably has tables at 2G (highmem). A
common location (other than < 1MB) is top of memory minus 16 MB. I
don't know what setting hw.physmem actually does -- does it change how
we can map high memory?