temperture sensor inside thinkpad?

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nirvana0001 · #1 Post by **nirvana0001** » Mon Oct 24, 2005 2:26 pm

The weather in here is start being cold, and the CHC showed my laptop temperture is much lower than the same setting in the summer obviously.
38C vs. 45C
I heard a lot of people said laptop doesn't has temperture sensor on the chipset, is that REALLY TRUTH?

rssb · #2 Post by **rssb** » Mon Oct 24, 2005 3:45 pm

in CHC i think you are reading the CPU, GPU or the HD temperature, these data are from specific units and there is no way to represent the entire unit temperature because everything produces different amount of heat and they are obviously at different temperatures

#3 Post by **jdhurst** » Mon Oct 24, 2005 4:19 pm

What you are seeing is the effect of ambient temperature. My T41 runs at 38 degrees C most of the time for three seasons. It runs warmer (40 - 41) in summer. The difference in my house is 20 for three seasons and 23 - 24 for the summer. ... JD Hurst

Kenn · #4 Post by **Kenn** » Mon Oct 24, 2005 7:04 pm

There is a temperature probe built into the CPU (which is what CHC reports afaik).

Someone also posted a few months ago about finding a temp probe on the motherboard - this one controls the system fan and is not reported to ACPI or whatever...

Volker · #5 Post by **Volker** » Tue Oct 25, 2005 10:10 am

There are five or six (don't remember exactly) thermal sensors distributed in the thinkpad. For example, using linux' ibm-acpi kernel module you can see the value recorded by each individual sensor. I don't know how the acpi turns this input into one "Temperature" output, but if you really want to know then you can always disassemble the DSDT

temperture sensor inside thinkpad?

temperture sensor inside thinkpad?

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