[blfs-support] lm-sensors-3.4.0, dx58so MoBo, x58 C/S, linux-3.19.8

Ken Moffat zarniwhoop at ntlworld.com
Sun Feb 28 16:32:55 PST 2016


On Sun, Feb 28, 2016 at 01:30:54PM -0800, Paul Rogers wrote:
> Getting some wierd numbers.  -41.5C?  I don't think so!  Nor 70.5C!
> Anybody got a reference for setting this asc7621 parms in lmsensors
> properly?  I think even the coretemp numbers are high.  It's doing
> nothing strenuous at the moment.  Fans are quiet.
> 

My general impression of lm_sensors is that you are lucky to get
sensible numbers from most things in lm_sensors.  Most consumer
motherboards get built to save the manufacturer money, so things
don't get connected.  If a fan records a speed, it is probably
accurate, but for everything else I disbelieve most readings.

So, if you can get a config that is better, all well and good - but
do not hold your breathe.  On my own boxen I take the measurements
that do not look outrageous (and are relevant - the temperature of
the PCI adapter might be accurate, but mostly I care about CPU
temperatures), and ignore the rest (I alias 'sensors' to a string
of commands to only show what I think might be sensible readings
).
> intel5500-pci-00a3
> Adapter: PCI adapter
> temp1:        +36.5 C  (high = +100.0 C, hyst = +90.0 C)
>                        (crit = +110.0 C)
> 
> asc7621a-i2c-0-2e
> Adapter: SMBus I801 adapter at 3000
> in0:          +1.08 V  (min =  +0.00 V, max =  +3.32 V)
> in1:          +1.18 V  (min =  +0.00 V, max =  +2.99 V)
> in2:          +3.22 V  (min =  +0.00 V, max =  +4.38 V)
> in3:          +5.07 V  (min =  +0.00 V, max =  +6.64 V)
> in4:         +11.83 V  (min =  +0.00 V, max = +15.94 V)
> fan1:         554 RPM  (min =    0 RPM)
> fan2:           0 RPM  (min =    0 RPM)
> fan3:           0 RPM  (min =    0 RPM)
> fan4:           0 RPM  (min =    0 RPM)
> temp1:        -41.5 C  (low  = -127.0 C, high =  +0.0 C)
>                        (crit = -17.0 C)
> temp2:        +46.2 C  (low  = -127.0 C, high = +127.0 C)
>                        (crit = +65.0 C)
> temp3:        +54.0 C  (low  = -127.0 C, high = +127.0 C)
>                        (crit = +65.0 C)
> temp4:        +70.5 C  (low  = -127.0 C, high = +127.0 C)
>                        (crit = +103.0 C)

temp4 might be intended to monitor the CPU package (critical value
is 3 degrees higher than the individual cores), or it might be
totally spurious.

> temp5:        -41.5 C  
> temp6:        -84.5 C  
> temp7:        +96.2 C  
> temp8:       +118.5 C  

Thos are probably not connected to anything.
> 
> coretemp-isa-0000
> Adapter: ISA adapter
> Core 0:       +59.0 C  (high = +80.0 C, crit = +100.0 C)
> Core 1:       +58.0 C  (high = +80.0 C, crit = +100.0 C)
> Core 2:       +57.0 C  (high = +80.0 C, crit = +100.0 C)
> Core 3:       +57.0 C  (high = +80.0 C, crit = +100.0 C)
> 
Those might be accurate, but they do seem high for an idle machine
where the motherboard is at about 36 degrees.

What generation of processor is this ?  I don't grok xeon numbers,
but I took a look at what intel say is compatible with that mobo,
and if they are like desktop (SandyBridge 2nnn, IvyBridge 3nnn,
Haswell 4nnn, Broadwell notionally 5nnn - in practice no Broadwell
desktop CPUs have shipped, Skylake 6mmm) then this is just an nnn
which implies it goes back to the days when intel was happy to burn
power to run faster.

If it _is_ a "run hot, run fast" machine, you might want to try a
cpufreq driver such as ondemand : yes, that will slow down some
things if your CPU supports it.

ĸen
-- 
This email was written using 100% recycled letters.


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