[lm-sensors] missing fan RPMS

Guenter Roeck guenter.roeck at ericsson.com
Sun May 13 04:37:57 CEST 2012


On Sat, May 12, 2012 at 10:03:25PM -0400, James wrote:
> On 05/12/12 21:53, Guenter Roeck wrote:
> > On Sat, May 12, 2012 at 05:25:21PM -0400, James wrote:
> >>
> >> I bought a new motherboard (ASRock 970 Extreme3) and it doesn't report the fans.
> >>
> > Hi James,
> > 
> >> nct6776-isa-0290
> >> Adapter: ISA adapter
> >> Vcore:        +0.86 V  (min =  +0.00 V, max =  +1.74 V)
> >> in1:          +1.85 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> AVCC:         +3.33 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> +3.3V:        +3.33 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> in4:          +1.58 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> in5:          +1.70 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> 3VSB:         +3.44 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> Vbat:         +3.34 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >> fan1:           0 RPM  (min =    0 RPM)  ALARM
> >> fan2:           0 RPM  (min =    0 RPM)  ALARM
> >> fan3:           0 RPM  (min =    0 RPM)  ALARM
> >> fan4:           0 RPM  (min =    0 RPM)  ALARM
> >> fan5:           0 RPM  (min =    0 RPM)  ALARM
> > 
> > Weird. We had a bug where fans where not recognized at all, but I have not seen
> > zero RPM reported.
> > 
> > If you like, you can try my experimental new driver from https://github.com/groeck/nct6775.
> > 
> >> sensors also doesn't show +12V or +5V.
> >>
> > Those will be among in1, in4, and in5. The ADC is range of the NCT6776F limited,
> > so the voltage passed to the chip is scaled. Question is which one is which.
> > Have a look at http://www.lm-sensors.org/wiki/VoltageLabelsAndScaling;
> > maybe it helps you finding out.
> > 
> > Guenter
> > 
> 
> I forgot to mention that the RPM of the fans is reported in the BIOS screen.
> 
You did, actually. So we know the rpm is measured, we just don't know if it is done
through the NCT6776F.

Guenter




More information about the lm-sensors mailing list