overheating problem with Acer Aspire 5520-5679 AMD-64

[eculp]

Scot,

That is exactly what I needed.  I'm sure your recipe will remedy all.

I can't thank you enough.  The fan part I was already doing, when and  
where possible but with a laptop it isn't always possible. nor good  
business to ask for a fan everywhere when traveling.

The sysctl tips saved me a world of time and I might never have found  
or even looked for all and k8temp is marvelous, I had no idea that it  
existed.  I've been using it for about half an hour now and and based  
on the results, I´ll script something to save me when I'm traveling or  
working in someone else's office which is about 50% for me.

Thanks again,

ed

Quoting Scot Hetzel <swhetzel at gmail.com>:

> On 5/28/08, eculp <eculp at encontacto.net> wrote:
>> I am running up to date current amd64 and am having issues with the laptop
>> just stopping with no warning and it seems to be due to overheating.  If I
>> keep the room temp cooler or keep air circulating under it, it doesn't
>> happen.
>>
>>  +ACPI Error (psparse-0626): Method parse/execution failed
>> [\\_TZ_.THRM._TMP] (Node 0xffffff0001212920), AE_NO_HARDWARE_RESPONSE
>>  +acpi_tz0: error fetching current temperature -- AE_NO_HARDWARE_RESPONSE
>>  +acpi_ec0: EcRead: failed waiting to get data
>>  +ACPI Exception (evregion-0529): AE_NO_HARDWARE_RESPONSE, Returned by
>> Handler for [EmbeddedControl] [20070320]
>>
>>  I'm thinking that maybe I should change the cpu speed and or other varibles
>> using sysctl until acpi can do it automatically.
>>
>>  Any suggestions on variables to play with or other solution?
>>
> I have been experiencing this problem also.  The solutions I have come
> up with are:
>
> 1. Hang Laptop off table by 4 inches to allow more air to reach the  
> bottom vent.
> 2. Change dev.cpu.0.freq to a lower value
>
> dev.cpu.0.freq: 1791
> dev.cpu.0.freq_levels: 1990/35000 1791/29200 1592/24200 796/7900
>
> 3. Direct a Fan at the bottom vent to force more air thru the vent.
>
> I also installed sysutils/k8temp to monitor the temp while compiling:
>
> # while true ; do k8temp ; sleep 30 ; done
> CPU 0 Core 1 Sensor 0: 65c
> CPU 0 Core 1 Sensor 0: 67c
>
> If the temp goes above 89c, the computer will lock up.  When I notice
> this, lowering dev.cpu.0.freq to a lower value is enough to allow the
> compile to finish.
>
> I have also added the following to sysctl.conf, but it doesn't seem to
> affect the thermal lock up problem.
>
> hw.acpi.thermal.user_override=1
> hw.acpi.thermal.tz0._PSV=3432
> hw.acpi.thermal.tz0._HOT=3600
> hw.acpi.thermal.user_override=0
>
> This changes _PSV from 90C to 70C, and sets _HOT.
>
> # sysctl hw.acpi.thermal
> hw.acpi.thermal.min_runtime: 0
> hw.acpi.thermal.polling_rate: 10
> hw.acpi.thermal.user_override: 0
> hw.acpi.thermal.tz0.temperature: 0.0C
> hw.acpi.thermal.tz0.active: -1
> hw.acpi.thermal.tz0.passive_cooling: 1
> hw.acpi.thermal.tz0.thermal_flags: 0
> hw.acpi.thermal.tz0._PSV: 70.0C
> hw.acpi.thermal.tz0._HOT: 86.8C
> hw.acpi.thermal.tz0._CRT: -1
> hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1
> hw.acpi.thermal.tz0._TC1: 2
> hw.acpi.thermal.tz0._TC2: 5
> hw.acpi.thermal.tz0._TSP: 50
>
> Scot
>