Re: [lm-sensors] missing fan RPMS

[Guenter Roeck <guenter.roeck@ericsson.com>]

On Sun, May 13, 2012 at 09:58:18PM -0400, James wrote:
> On 05/13/12 20:48, Guenter Roeck wrote:
> > On Sun, May 13, 2012 at 08:08:28PM -0400, James wrote:
> > [ ... ]
> > 
> >>> +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:           +3.46 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >>> Vbat:           +3.36 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
> >>> fan1:          1369 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
> >>> SYSTIN:         +36.0 C  (high =  +0.0 C, hyst =  +0.0 C)  ALARM  sensor = thermistor
> >>> CPUTIN:         +35.0 C  (high = +80.0 C, hyst = +75.0 C)  sensor = thermistor
> >>> AUXTIN:          -2.0 C  (high = +80.0 C, hyst = +75.0 C)  sensor = thermistor
> >>> PCH_CHIP_TEMP:   +0.0 C  
> >>> PCH_CPU_TEMP:    +0.0 C  
> >>> PCH_MCH_TEMP:    +0.0 C  
> >>> cpu0_vid:      +0.000 V
> >>> intrusion0:    ALARM
> >>> intrusion1:    ALARM
> >>>
> >>> It is labelled 'Chassis fan connector 1" by the motherboard manual.
> >>> The other is 'Chassis fan 3'
> >>>
> >>> The difference is fan1 is 3 pin and fan3 is 4 pin.
> >>> I will try moving the 4 pin over so it is only using 3 pins.
> >>>
> >>> _______________________________________________
> >>> lm-sensors mailing list
> >>> lm-sensors@lm-sensors.org
> >>> http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
> >>>
> >>
> >> :-(
> >> Both fans connected but only one shows up.
> >>
> > Yes, I think that is exactly the problem. Looks like the board uses a multiplexer
> > to connect multiple fans to the same fan sensor input. Which makes it all but impossible
> > for third parties (like Linux) to implement working fan control. Really annoying,
> > especially since the NCT6776F has really a lot of fan sensor inputs available.
> > 
> > At least some of the other boards from the same vendor have lots of fan connectors.
> > Did you try all of them ?
> > 
> > Guenter
> > 
> 
> If they are multiplexed, it is weird I didn't at least get 2 numbers when I was moving them around.
> I tried all the plugs on the motherboard.
> If I get the information from ASRock about how to read the fan speeds, could I make a config file specific to this motherboard?
> 
Maybe they are all multiplexed to the single fan sensor input. If so, that means
that only one of the fans can be measured at any given time.

Guenter

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