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> I have seen this in the past, many, many times. I'm in this
> "business" (and I'm using quotes because it's mostly done on my spare > time) for 8 years so I have some experience about it all. > > Let's just take the machine I'm working on right now as an example. > It's a Celeron 2.4 GHz on an Asus P4P800-VM board, using a Winbond > W83627THF for monitoring. The BIOS displays a CPU temperature of > 39.5°C. Linux displays a CPU temperature of 32.5°C. This is a 6°C > difference, close to what you're seeing on your system. > > This machine happens to be plugged on a powermeter, so I can see that > it consumes 84 W in the BIOS, and only 62 W under Linux. So the > temperature difference is easily explained. As a matter of fact, if I > put some load on the CPU (md5sum -b /dev/zero) the temperature climbs > to 40°C, so roughly the same as what the BIOS prints. > > I am not claiming that there is no bug in our IT8728F support. Without > a datasheet, odds are there are bugs. I am not even claiming that no > adjustments must be made for "sensors" to report the right CPU > temperature on your specific system. I am claiming that you did not > provide factual data that would make me regard this possibility as > likely. > > If you want to make sure, then get your hands on a powermeter, or > external thermometer, or ideally both. Then compare their measurements > under the BIOS and under Linux. If these measurements are the same and > the CPU temperature values reported by the BIOS and "sensors" differ > significantly, then OK, I'll admit some more investigation, and possible > a fix, are needed. > > -- > Jean Delvare > http://khali.linux-fr.org/wishlist.html Now we are talking, thanks for the information. :) I guess, my original intention with my letter wasn´t giving you more work but rather broadcasting that it might be a problem with the IT8728F support, i guess with 3.3 out we will soon see more usage of it. And maybe more people will report, or not... With your experience what would you recommend. 1. Asssuming ~26 C is the real idle value 2. fiddle with the lm sensors config file and add a couple of degrees 3. Get a life and stop monitoring my fan speeds and temps Thanks for your help Tomas |
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