About "acpi0: reservation of ... failed" message in `dmesg`

[lavator]

Hi,

Our customers are concerned about the following messages in `dmesg` output.

acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, bff00000 (3) failed

The outputs of `dmesg` and `acpidump -dtv` are attached. Please help to clarify this issue.

Or , in other direction, where to find official document to convince our customers that these messages are ignorable ?

[SirDice]

Try updating the BIOS of the machine. If that doesn't work you could try updating to -STABLE.

[lavator]

Indeed, i am the BIOS engineer of the system. Our system got no ACPI error on Linux, but it got the above reservation failure message.

[lavator]

We got answered on http://lists.freebsd.org/ , hence i copy the response here as a conclusion.

According to http://lists.freebsd.org/pipermail/freebsd-acpi/2010-May/006503.html ,


It is related to the sysresource acpi memory objects. It means that
something was using the system resource before acpi allocated it. For
#1, that looks like lowmem up to the VGA range. For #2, it looks like
option ROMs.

The BIOS has configured the devices beforehand so as long as everything
works, the msgs can be ignored.

[paulfrottawa]

That would explain this problem I'm having.

sysctl hw.acpi.thermal.tz0.temperature
sysctl: unknown oid 'hw.acpi.thermal.tz0.temperature'

_______________________________________________

I have the same errors.
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 7f700000 (3) failed

FreeBSD freew 9.0-RC3 FreeBSD 9.0-RC3 #0: Sun Dec 4 08:01:02 UTC 2011
root@obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386