Re: what is shutting off my computer?

On 29 Dec 2007, in the Usenet newsgroup comp.os.linux.hardware, in article
<slrnfnbmpi.vk.BobT@xxxxxxxxxxxxxxxxxxx>, Bob Tennent wrote:

General Schvantzkopf wrote:

Bob Tennent wrote:

Even when the system is 100% idle, the CPU temperature is 61<B0>C
according to lm_sensors. The "high" value is 80<B0>C, and I believe
the system shuts down if the CPU utilization goes too high, even
if the real temperature is much lower.

You don't mention the actual hardware you are using, but some CPU
designs have an internal thermal shutdown that you have no control over.

Can this be fixed by editing a configuration file or turning off
the broken thermistor?

If you are referring to the CPU temperature sensor as read by lm_sensors,
that's a dedicated diode ON THE CPU DIE, and if it's b0rken, you toss
the CPU.

You might be able to disable shutdown in the BIOS but I wouldn't do
that if I were you. It's entirely possible that the temps are real.

If it's just lm_sensors, there is a configuration file that should
be checked (compare the reported temperatures via lm_sensors verses
the temperature reported WHILE REBOOTING in the BIOS). But I'd be
looking a lot closer at the hardware first.

No way. On a "cold" start, the CPU temperature is over 50, even when
the motherboard is at 22.

Pop the case screws so that you can "quickly" access the interior,
and run the system for a while until the temperatures reported are
stable. Quickly BUT CAREFULLY remove the case, and try to touch the
heat sink of the CPU. Is the d4mn thing warm or not? In Linux, an
idling CPU shouldn't be very much above ambient _room_ temperature
(check the CPU load in the third line of a 'top' output). While you
are looking at the CPU, is the CPU fan running? Is the case free of
dust bunnies and pet moose hair?

Depending on your unidentified hardware, this could be a motherboard
or power supply problem (CPU voltages), defective bypass capacitors
(little tiny things on the motherboard), bad cooling (heatsink not
installed properly, bad fan[s], cables/cards/other_crap blocking
the airflow), or a defective CPU itself.

Old guy
.

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