Re: Getting correct temperature information from Intel 945GSE/ICH7M

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On Tue, May 07, 2013 at 04:23:51PM +0000, Sebastian Werner wrote:
> > On Tue, May 07, 2013 at 12:54:21PM +0000, Sebastian Werner wrote:
> > > >
> > > >>On Mon, May 06, 2013 at 12:31:11PM +0000, Sebastian Werner wrote:
> > > >> Hello,
> > > >>
> > > >> I am trying to get the right temperature from two different pieces of
> > hardware.
> > > >> The first, newest piece (http://www.jetwaycomputer.com/ITX-
> > JBC362F36.html) works right out of the box. Got lm-sensor on the debian
> > system, sensors-detect tells me to modprobe lm78 and the temperature is
> > roughly the same as the one shown in the bios.
> > > >>
> > > >> Acpitz-virtual-0
> > > >> Adapter: Virtual device
> > > >> Temp1:              +40.0°C  (crit = +127.0°C)
> > > >> Temp2:              +26.8°C  (crit = +127.0°C)
> > > >> Temp3:              +26.8°C  (crit = +100.0°C)
> > > >>
> > > >This output is not from the lm78 driver.
> > > >
> > > >The "coretemp" driver works with this CPU (Atom N2600). Load it and see
> > what it reports.
> > >
> > > Weirdly enough, trying to load "coretemp" on the new hardware gives me
> > > a  "No such device" error ...
> > >
> > Old drivers, most likely. What is the output of /proc/cpuinfo ?
> 
> old system:
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 28
> model name      : Intel(R) Atom(TM) CPU N270   @ 1.60GHz
> stepping        : 2
> cpu MHz         : 1600.128
> cache size      : 512 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 1
> apicid          : 0
> initial apicid  : 0
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm
> bogomips        : 3200.25
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 32 bits physical, 32 bits virtual
> power management:
> 
> new system:
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 54
> model name      : Intel(R) Atom(TM) CPU N2600   @ 1.60GHz
> stepping        : 1
> cpu MHz         : 1596.218
> cache size      : 512 KB
> physical id     : 0
> siblings        : 4
> core id         : 0
> cpu cores       : 2
> apicid          : 0
> initial apicid  : 0
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 10
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr s
> se sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl est tm
> 2 ssse3 cx16 xtpr pdcm movbe lahf_lm arat
> bogomips        : 3192.43
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 36 bits physical, 48 bits virtual
> power management:
> 
Both are supported by the current version of the coretemp driver.

> > > Like Jean mentioned, I am running a rather old version, due to having
> > > old packages and all their baggage. I took the newest version from
> > > http://dl.lm- sensors.org/lm-sensors/files/sensors-detect and reran it
> > > on all the systems I have access to.
> > > sensors-detect output:
> > >
> > > Driver `coretemp':
> > >   * Chip `Intel digital thermal sensor' (confidence: 9)
> > >
> > > Driver `f71882fg':
> > >   * ISA bus, address 0x295
> > >     Chip `Fintek F71808A Super IO Sensors' (confidence: 9)
> > >
> > > #----cut here----
> > > # Chip drivers
> > > modprobe coretemp
> > > modprobe f71882fg
> > > /usr/bin/sensors -s
> > > #----cut here----
> > >
> > >
> > > >> Not temp2 and temp3 though. Both temperatures never change and
> > they have no connection to anything I can read in the bios.
> > > >> I presumed that those are 'dead wires' and I am at the moment ignoring
> > those, since temp1 is good enough for me.
> > > >>
> > > >The temperatures are reported by ACPI. No idea how that translates to
> > > >hardware temperatures. If the temperature never changes, there may be
> > > >a bug in the ACPI tables. Those are controlled by the board
> > > >manufacturer, and would be updated with the BIOS. Do you have the
> > latest BIOS versions installed ?
> > > >
> > > >> The second, the older piece (http://www.jetwaycomputer.com/ITX-
> > JBC360F33-B.html) does not seem to work. Sensors-detect tells me to load
> > coretemp, using the latest version of sensors-detect from the site wants to
> > also me to load the f71882fg driver. That doesn't work out with a 'No such
> > device' error.
> > > >>
> > > >What is your kernel version, and what exactly does sensors-detect report
> > ?
> > >
> > > I am on debian sqeeze, running 2.6.32-5-686
> > >
> > You will need a more recent kernel version, or install stand-alone drivers for
> > both coretemp and f71882fg. Not sure what the lm78 detection is about, but
> > that doesn't look correct as Jean pointed out.
> 
> That is sadly out of the question, at least for the foreseeable future.
> Which means I have to work with the coretemp on the old model and that one
> acpi value on the new.
> 
Guess so. After all, 2.6.32 was released in December 2009, and you can not
expect it to support hardware released after that date (N2600 was released in
Q4/2011). Whoever makes release decisions in your company will have to accept
that.

Thanks,
Guenter

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