Atom N270 - ACPI Error: [RTMP] Namespace lookup failure

[Ed VanderPloeg]

I updated to 8-stable but am still getting ACPI error messages to 
console every 10 seconds.

What happens when sysctl hw.acpi.thermal.polling_rate=0?  Does this 
disable polling?  I noticed that when I set it to zero, the error 
messages seem to stop, but then setting it to a non-zero value never 
brings the messages back again.

Ed

On 2011-06-29 12:45 PM, Andriy Gapon wrote:
> on 29/06/2011 21:01 Ed VanderPloeg said the following:
>> On 2011-06-29 2:38 AM, Andriy Gapon wrote:
>>> on 29/06/2011 01:07 Ed VanderPloeg said the following:
>>>> I'm using an Aaeon AEC-6831 embedded system based on an Intel Atom N270, which
>>>> uses their GENE-9455 motherboard.  After updating the BIOS to enable ACPI, I'm
>>>> now getting the following (verbose) console message during boot and every 10
>>>> seconds thereafter:
>>>>
>>>> ACPI Error: [RTMP] Namespace lookup failure, AE_NOT_FOUND (20101013/psargs-464)
>>>> ACPI Error: Method parse/execution failed [\_TZ_.THRM._TMP] (Node 0xc56b0760),
>>>> AE_NOT_FOUND (20101013/psparse-633)
>>>> acpi_tz0: error fetching current temperature -- AE_NOT_FOUND
>>>
>>> The problem is that RTMP is defined as an external object:
>>> External (RTMP, IntObj)
>>> so it's supposed to come from an additional table, but apparently either no
>>> additional table defines it or a necessary additional table is not loaded.
>>> This could be either a BIOS problem or... something else :)
>>
>> Aaeon tech support has now stated that the errors are from a faulty BIOS, and
>> that AWARD will eventually release an update to fix this.
>
> OK.
>
>>>> The unit seems to run very warm which makes me wonder if this problem is
>>>> preventing lower power states, if such things are related.
>>>>
>>>> I've collected the outputs from a verbose dmesg, from sysctl hw.acpi, and from
>>>> acpidump.  They are zipped up over here:
>>>>
>>>> http://www.agilecontrols.com/post/aec6831_acpi.zip
>>>
>>> Try either recent stable/8 or head (aka CURRENT) and see if it helps.  They
>>> contain a change that may be a work-around for a BIOS (ACPI tables) like yours.
>>
>> I'll give stable/8 a try.
>>
>> Does this error indicate something potentially harmful, or if it is benign?  I
>> can silence the messages easy enough until a BIOS update comes out.
>
>
> Actually I was speaking about potentially making est driver attach on your
> system.  I also suspected that RTMP might have gotten loaded from the same
> dynamic table that is related to est attachment issue, but apparently that was
> not going to happen.
>