[Follow-ups set to comp.os.linux.misc]

Hi,

I've recently installed lm_sensors, and it runs just fine. The one thing
that is confusing me is what all the sensors actually mean! Below is a
copy of what I get when I run sensors:

    [dylan@localhost dylan]$ sensors
    via686a-isa-6000
    Adapter: ISA adapter
    CPU core:  +1.83 V  (min =  +1.50 V, max =  +2.00 V)
    +2.5V:     +0.31 V  (min =  +0.06 V, max =  +3.10 V)
    I/O:       +3.37 V  (min =  +3.12 V, max =  +3.45 V)
    +5V:       +5.20 V  (min =  +4.73 V, max =  +5.20 V)
    +12V:     +12.19 V  (min = +11.35 V, max = +12.48 V)
    CPU Fan:     0 RPM  (min =    0 RPM, div = 2)
    P/S Fan:     0 RPM  (min =    0 RPM, div = 2)
    CPUTemp:   +34.8�C  (high =   +60�C, hyst =   +25�C)
    SYSTemp:   +24.6�C  (high =   +45�C, hyst =   +20�C)
    SBrTemp:   +25.5�C  (high =   +65�C, hyst =   +60�C)
    ^^^^^^^

Now I can make out what most of it means, and I'm not really bothered
about understanding the voltages, but the one value that I really don't
understand is "SBrTemp"! What does this actually refer to?

TIA

-- 
Dylan Parry
http://webpageworkshop.co.uk - FREE Web tutorials and references

'I am a Bear of Very Little Brain, and long words bother me.' -- A A Milne

Dylan Parry wrote:

> I've recently installed lm_sensors, and it runs just fine. The one thing
> that is confusing me is what all the sensors actually mean! Below is a
> copy of what I get when I run sensors:
> 
>     [dylan@localhost dylan]$ sensors
>     via686a-isa-6000
>     Adapter: ISA adapter
>     CPU core:  +1.83 V  (min =  +1.50 V, max =  +2.00 V)
>     +2.5V:     +0.31 V  (min =  +0.06 V, max =  +3.10 V)
>     I/O:       +3.37 V  (min =  +3.12 V, max =  +3.45 V)
>     +5V:       +5.20 V  (min =  +4.73 V, max =  +5.20 V)
>     +12V:     +12.19 V  (min = +11.35 V, max = +12.48 V)
>     CPU Fan:     0 RPM  (min =    0 RPM, div = 2)
>     P/S Fan:     0 RPM  (min =    0 RPM, div = 2)
>     CPUTemp:   +34.8�C  (high =   +60�C, hyst =   +25�C)
>     SYSTemp:   +24.6�C  (high =   +45�C, hyst =   +20�C)
>     SBrTemp:   +25.5�C  (high =   +65�C, hyst =   +60�C)
>     ^^^^^^^

Southbridge Temp. - This could be some internal sensor inside the
via686a. It seems, however, that the readings are not reliable. So
everybody suggests to simply ignore that value.


Cheers, Jack.

-- 
----------------------------------------------------------------------
My personal reading of the string "MicroSoft" expands to "NanoWeak"...

jack wrote:

> Southbridge Temp. - This could be some internal sensor inside the
> via686a. It seems, however, that the readings are not reliable. So
> everybody suggests to simply ignore that value.

Cheers, that makes perfect sense. I was planning on ignoring it anyway,
unless it was something interesting like the temp of my RAM or something :)

-- 
Dylan Parry
http://webpageworkshop.co.uk - FREE Web tutorials and references

Playing: 'Hearts' by Yes

SBrTemp - System Board Temperature

Dylan Parry wrote:
> [but the one value that I really don't
> understand is "SBrTemp"! What does this actually refer to?

Dylan Parry <usenet@dylanparry.com> wrote:
>[Follow-ups set to comp.os.linux.misc]
>
>Hi,
>
>I've recently installed lm_sensors, and it runs just fine. The one thing
>that is confusing me is what all the sensors actually mean! Below is a
>copy of what I get when I run sensors:
>
>    [dylan@localhost dylan]$ sensors
>    via686a-isa-6000
>    Adapter: ISA adapter
>    CPU core:  +1.83 V  (min =  +1.50 V, max =  +2.00 V)
>    +2.5V:     +0.31 V  (min =  +0.06 V, max =  +3.10 V)

That reading is almost certainly being incorrectly adjusted.
My bet is that it in fact is +3.10 volts, not +0.31 volts.

You might take a look at the configuration file and see if
there is a divide by 10 that can be removed.

>    I/O:       +3.37 V  (min =  +3.12 V, max =  +3.45 V)
>    +5V:       +5.20 V  (min =  +4.73 V, max =  +5.20 V)
>    +12V:     +12.19 V  (min = +11.35 V, max = +12.48 V)
>    CPU Fan:     0 RPM  (min =    0 RPM, div = 2)
>    P/S Fan:     0 RPM  (min =    0 RPM, div = 2)

It is very unfortunate that the fans are not being monitored.
It that possibly  another configuration problem?  Monitoring
fans is perhaps the single most useful thing one can do with
lm_sensors, as the fans are more likely to fail than anything
else.

>    CPUTemp:   +34.8�C  (high =   +60�C, hyst =   +25�C)
>    SYSTemp:   +24.6�C  (high =   +45�C, hyst =   +20�C)
>    SBrTemp:   +25.5�C  (high =   +65�C, hyst =   +60�C)
>    ^^^^^^^
>
>Now I can make out what most of it means, and I'm not really bothered
>about understanding the voltages, but the one value that I really don't
>understand is "SBrTemp"! What does this actually refer to?

Others have pointed out the significance of that one.

I ran lm_sensors on my three systems for awhile when I was using
a 2.4 kernel.  I have moved to 2.6 kernels and have not even
looked to see if lm_sensors has been ported yet.  There are two
reasons for not bothering, one of which is probably not of
concern to you, and the other may or may not be.

First and worst for me, two boxes are SMP systems, and that
means the power control options for the kernel will not work.
Hence I can log the fact that a fan has quit, and would even be
able to log the sequence as a CPU goes up in smoke...  but it
can't easily be arranged to just shut the thing off!  (It could,
with some extra hardware on a serial port to mechanically send a
shutdown the motherboard, but the next problem caused me to not
work that one out.)

I've had this running on two different (old) ASUS motherboards
and a now 2 year old Tyan board.  All three throw false alarms
on a *regular* basis.  Voltage alarms usually, but I've had temp
and fan alarms on occasion.  Near as I can tell, the motherboard
is the source of these alarms and lm_sensors is correctly
reporting what it finds.  Regardless of where it originates,
they are definitely bogus.

The problem with lm_sensors is that it does not have the
flexibility to deal with that.  Something where it had to sense
an alarm continuously for say 3 seconds, or whatever, would
solve it.  But as is, if lm_sensors is actually used to protect
the system by shutting down in the presence of an alarm, there
would be regular shutdowns.  (That is as lm_sensors was a bit
over a year ago, and I do not know if it has been upgrade since.
These problems might all be just history.)

-- 
FloydL. Davidson           <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska)                         floyd@barrow.com

On Thu, 22 Jul 2004 08:37:14 +0100, Dylan Parry wrote:

> Now I can make out what most of it means, and I'm not really bothered
> about understanding the voltages, but the one value that I really don't
> understand is "SBrTemp"! What does this actually refer to?

I would guess "System Board".  The other one (SYSTemp) probably is meaning
the air temp inside the case.

-- 
If you're not on the edge, you're taking up too much space.
Linux Registered User #327951

rm -rf /home/Dylan Parry:

> Now I can make out what most of it means, and I'm not really bothered
> about understanding the voltages, but the one value that I really don't
> understand is "SBrTemp"! What does this actually refer to?

Southbridge chip temperature?

-- 
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