CPU Overheating?

[Mike Jeays]

On Mon, 31 Mar 2014 00:11:43 +0000 (UTC)
Walter Hurry <walterhurry at gmail.com> wrote:

> I have a bog-standard Acer laptop with FreeBSD 9.2 (amd64).
> 
> CPU is  AMD Athlon(tm) 64 X2 Dual-Core Processor TK-42 (1596.09-MHz K8-class CPU) per dmsg.
> 
> From time to time, it shuts off without warning, as if the power cable has been pulled out. Nothing in any of the logs, and when I power up again it starts normally after replaying the journal.
> 
> The shut-off is invariably when it is doing a compile of a big port. I therefore suspect that the CPU is overheating and that the BIOS is causing the shutdown.
> 
> To investigate the problem, I have done a 'kldload coretemp' and am periodically running:
>  'sysctl hw.acpi.thermal.tz0.temperature'. So far (only 6 runs) this is reporting temperatures between 76C and 84C.
> 
> Question 1: Is this the canonical way to monitor CPU temperature?
> Question 2: Is this too hot?
> Question 3: I plan to load the module in /boot/loader.conf and set up a cron job to run every minute and log the result to a file. Is this sensible, or overkill?
> 
> Thanks.
> 
> 
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The maximum temperature is given as 95C. You are under, but it seems quite
likely to be the problem. Logging it very minute will be well worth trying,
and might be quite informative.

See:
http://www.cpu-world.com/CPUs/K8/AMD-Athlon%2064%20X2%20TK-42%20-%20AMETK42HAX5DM.html