Re: Acer Laptop overheating with ACPI error that I don't understand.

Hi--

On Jul 14, 2009, at 4:54 PM, Edwin L. Culp W. wrote:
> I am having overheating problems with my Acer Aspire laptop.
> # uname -a
> FreeBSD ed.local.net.mx 8.0-BETA1 FreeBSD 8.0-BETA1 #256: Thu Jul  9
> 07:05:20 CDT 2009     root_at_ed.local.net.mx:/usr/obj/usr/src/sys/ 
> ENCONTACTO
> i386
>
> I've been having this problem for several months and compensating by
> reducing dev.cpu.0.freq from 1900 to 1200 and 800 in warm offices.

Presumably you should be talking to Acer-- if it overheats badly in  
normal operation, there's probably something wrong with a fan,  
temperature sensor, or something.

> The errors I'm seeing in the log files are:
>
> +acpi_ec0: EcRead: failed waiting to get data
> +ACPI Exception: AE_NO_HARDWARE_RESPONSE, Returned by Handler for
> [EmbeddedControl] 20090521 evregion-531
> +ACPI Error (psparse-0633): Method parse/execution failed [\ 
> \_TZ_.THRM._TMP]
> (Node 0xc4e75960), AE_NO_HARDWARE_RESPONSE
>
> I'm afraid that I don't understand them.

acpi_ec0 is the embedded controller handling ACPI events.  It should  
be responsible for adjusting active cooling measures like fan speed in  
response to temperature changes.  See "man acpi_thermal"....

Regards,
-- 
-Chuck