Re: Measured Fan RPM Jumps Frequently to 675000 RPM

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On Wed, Sep 18, 2013 at 10:51:37AM +0200, Sascha Haupt wrote:
> 
> Dear @ll,
> 
> I am monitoring multiple systems (with Asus M5A78LE mainboards)
> using sensors and Munin.
> 
> On one node I often get a value of 675000 RPM for the FAN2 speed.
> Usually, the value of FAN2 is approx 1950 RPM.
> 
> The jump can frequently be seen if sensors is executed manually in a
> fast sequence:
> 
The driver only reports what it gets from the system through ACPI.
I don't think there is anything we can do about it.

Luca, any idea ?

Guenter

> 
> host:~ # sensors
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:        +0.0°C  (high = +70.0°C, crit = +90.0°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:       +1.42 V  (min =  +0.85 V, max =  +1.70 V)
>  +3.3 Voltage:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:         +5.08 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:       +12.40 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:      3813 RPM  (min =  600 RPM)
> CHASSIS FAN Speed:  1406 RPM  (min =  600 RPM)
> CHASSIS FAN 2 Speed:675000 RPM  (min =  600 RPM)
> CPU Temperature:     +43.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:      +38.0°C  (high = +45.0°C, crit = +75.0°C)
> 
> host:~ # sensors
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:        +0.0°C  (high = +70.0°C, crit = +90.0°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:       +1.42 V  (min =  +0.85 V, max =  +1.70 V)
>  +3.3 Voltage:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:         +5.08 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:       +12.40 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:      3813 RPM  (min =  600 RPM)
> CHASSIS FAN Speed:  1406 RPM  (min =  600 RPM)
> CHASSIS FAN 2 Speed:675000 RPM  (min =  600 RPM)
> CPU Temperature:     +43.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:      +38.0°C  (high = +45.0°C, crit = +75.0°C)
> 
> host:~ # sensors
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:        +0.0°C  (high = +70.0°C, crit = +90.0°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:       +1.42 V  (min =  +0.85 V, max =  +1.70 V)
>  +3.3 Voltage:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:         +5.08 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:       +12.42 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:      3813 RPM  (min =  600 RPM)
> CHASSIS FAN Speed:  1409 RPM  (min =  600 RPM)
> CHASSIS FAN 2 Speed:1950 RPM  (min =  600 RPM)
> CPU Temperature:     +43.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:      +38.0°C  (high = +45.0°C, crit = +75.0°C)
> 
> host:~ # sensors
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:        +0.0°C  (high = +70.0°C, crit = +90.0°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:       +1.42 V  (min =  +0.85 V, max =  +1.70 V)
>  +3.3 Voltage:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:         +5.08 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:       +12.42 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:      3813 RPM  (min =  600 RPM)
> CHASSIS FAN Speed:  1409 RPM  (min =  600 RPM)
> CHASSIS FAN 2 Speed:1950 RPM  (min =  600 RPM)
> CPU Temperature:     +43.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:      +38.0°C  (high = +45.0°C, crit = +75.0°C)
> 
> host:~ # sensors
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:        +0.0°C  (high = +70.0°C, crit = +90.0°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:       +1.42 V  (min =  +0.85 V, max =  +1.70 V)
>  +3.3 Voltage:       +3.40 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:         +5.08 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:       +12.42 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:      3813 RPM  (min =  600 RPM)
> CHASSIS FAN Speed:  1409 RPM  (min =  600 RPM)
> CHASSIS FAN 2 Speed:1950 RPM  (min =  600 RPM)
> CPU Temperature:     +43.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:      +38.0°C  (high = +45.0°C, crit = +75.0°C)
> 
> 
> This just happens on one node. On the other nodes the measured
> values seem to be stable.
> 
> Thanks for your help.
> 
> Regards
> Sascha Haupt
> 
> 
> 
> 
> _______________________________________________
> lm-sensors mailing list
> lm-sensors@xxxxxxxxxxxxxx
> http://lists.lm-sensors.org/mailman/listinfo/lm-sensors

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