Linux Temperature Reading

[MikePikeFL]

I'm having problems reading my CPU temp in Linux. I have an EPoX 8K7A (VIA 686B temp chipset) running 2.4.18 (slackware 8). I have tried using both the ACPI temp reading and i2c lmsensors.

Can anyone help me out with this? Anyone have better results than me? Thanks!

 

[Armitage]

what kind of output did you get from the lmsensors setup program? Did it appear to detect your sensor chips properly?

 

[MikePikeFL]

I realized I should have posted some info about it after I submitted the thread. It does detect it and i even get output. Some things work like voltages and fan speeds, but the temp always shows 127 degrees Celcius... a tad high...

lm80-i2c-0-2d
Adapter: SMBus Via Pro adapter at 5000
Algorithm: Non-I2C SMBus adapter
+5V: +5.21 V (min = +4.74 V, max = +6.03 V) ALARM
VTT: +1.47 V (min = +1.90 V, max = +2.10 V) ALARM
+3.3V: +2.55 V (min = +3.13 V, max = +3.46 V) ALARM
+Vcore: +1.84 V (min = +1.80 V, max = +1.99 V) ALARM
+12V: +13.14 V (min = +11.37 V, max = +12.57 V) ALARM
-12V: -13.00 V (min = -12.73 V, max = -11.52 V)
-5V: -5.20 V (min = -5.33 V, max = -4.82 V) ALARM
fan1: 10629 RPM (min = 6000 RPM, div = 1)
fan2: 10000 RPM (min = 6000 RPM, div = 1)
temp: +127.00 �C (hot:limit = +6�C, hysteresis = +5�C) ALARM
(os: limit = +6�C, hysteresis = +5�C) ALARM
alarms: Board temperature input (a LM75 perhaps?) ALARM
alarms: Chassis intrusion detection ALARM

 

[Armitage]

Yipe, that is a bit high!
Are you sure it's not reading in farenheit? 137 F = 58C which is reasonable, if still a bit high.
Have you ever booted this system to an MS OS and tried one of the Windows based monitors? How did it compare?
Did you check the sensor chipset detected by lmsensors against the motherboard specs?
Does the reading you're getting react to load (ie. does it go up when the machine is not idle).

If it appears that the problem is just an offset, I think most tools let you add in a scale factor.

 

[MikePikeFL]

<< Yipe, that is a bit high!
Are you sure it's not reading in farenheit? 137 F = 58C which is reasonable, if still a bit high.
Have you ever booted this system to an MS OS and tried one of the Windows based monitors? How did it compare?
Did you check the sensor chipset detected by lmsensors against the motherboard specs?
Does the reading you're getting react to load (ie. does it go up when the machine is not idle).

If it appears that the problem is just an offset, I think most tools let you add in a scale factor. >>



I don't think it's reading in farenheit, but if it is, it never changes. I used to have windows on this machine and ran several monitors, all of which detected around 122F, but they did change depending on load. lmsensors never changes.

I read up on the chipsets and the viapro module is appropriate for my chipset. Everything else works fine, just not temp...

 

[nuttervm]

have you tried gkrellm? i dont know what software libraries it uses under the hood to monitor temps, but i know it has the capability.

 

[MikePikeFL]

<< have you tried gkrellm? i dont know what software libraries it uses under the hood to monitor temps, but i know it has the capability. >>



gkrellm uses i2c... i tried it after you suggested it, thinking maybe it would work but I get the same problem... 127 degrees celcius solid

 

[MikePikeFL]

WOO HOO! I did some more reading, and it was incorrectly detecting the lm80 sensor... so I found that it should be using the via686a driver, on the ISA bus... got the latest version (2.6.2 was the latest when I started on this fun journey)... and it works great now! Thanks for all the help.

 

[BlackOmen]

What I want to know is why the **** is it on the ISA bus.

Aside from that, a 2 month problem with me getting lm sensors to work was solved tonight when I pieced together google searches and realized that I need to have ACPI bus manager support compiled into the kernel (a module would give unresolved symbols). Once that kernel was compiled, the ACPI bus was enumerated and the via686a module loaded.

I'm still getting some bogus readings though:
via686a-isa-6000
Adapter: ISA adapter
Algorithm: ISA algorithm
CPU core: +3.03 V (min = +1.79 V, max = +2.18 V) ALARM
+2.5V: +3.03 V (min = +2.24 V, max = +2.74 V) ALARM
I/O: +3.32 V (min = +2.95 V, max = +3.62 V)
+5V: +6.30 V (min = +4.47 V, max = +5.49 V) ALARM
+12V: +15.28 V (min = +10.79 V, max = +13.18 V) ALARM
CPU Fan: 5113 RPM (min = 3000 RPM, div = 2)
P/S Fan: 4272 RPM (min = 3000 RPM, div = 2)
SYS Temp: -69.3°C (limit = +60°C, hysteresis = +50°C)
CPU Temp: -69.3°C (limit = +60°C, hysteresis = +50°C)
SBr Temp: +22.8°C (limit = +60°C, hysteresis = +50°C)

 

[MikePikeFL]

<< What I want to know is why the **** is it on the ISA bus.

Aside from that, a 2 month problem with me getting lm sensors to work was solved tonight when I pieced together google searches and realized that I need to have ACPI bus manager support compiled into the kernel (a module would give unresolved symbols). Once that kernel was compiled, the ACPI bus was enumerated and the via686a module loaded.

I'm still getting some bogus readings though:

SYS Temp: -69.3°C (limit = +60°C, hysteresis = +50°C)
CPU Temp: -69.3°C (limit = +60°C, hysteresis = +50°C)
>>



Wow are you running some liquid nitrogen cooling system?

That's odd about the ACPI bus manager tho... I was playing around with that to try and use ACPI to read the temps, but my system screwed up royally with ACPI (in conjunction with faster memory settings).

So mine is working without any ACPI support at all. What motherboard / chipset do you have?

And yeah, no clue about the ISA bus thing... maybe that's just the interface to the chipset or something...

 

[BlackOmen]

<< Wow are you running some liquid nitrogen cooling system? >>
Actually, those temps seem to be the same as when I used to run Windows, except the opposite.

<< That's odd about the ACPI bus manager tho... I was playing around with that to try and use ACPI to read the temps, but my system screwed up royally with ACPI (in conjunction with faster memory settings).>>

<< So mine is working without any ACPI support at all. What motherboard / chipset do you have? >>
FIC AZ11 w/ VIA 82C686a. If I would not have the bus manager compiled in, the via686a module would load, but the sensors command would complain that no sensors were found. The ACPI bus manager would not load as a module (complained of unresolved symbols) so it needed compiled in (I like monolithic kernels anyways).

<< And yeah, no clue about the ISA bus thing... maybe that's just the interface to the chipset or something... >>

What seems weirder is that I have no ISA slots, and there's no mention of ISA PnP anywhere in the BIOS.
What I think I'm going to do is try a different power supply to see how much my voltage readings change. If they become normal, then I'll attribute it to the power supply. If they remain off like they are now, I'll attribute it to the sensors (the documentation does mention that VIA won't release specs for the sensors).