How To Find Out Fan Speed Via Software

[max bianco]

On Jan 17, 2008 11:44 AM, Robin Laing <Robin.Laing at drdc-rddc.gc.ca> wrote:

> John Summerfield wrote:
> > Robert L Cochran wrote:
> >> Is there a way to find out the cpu fan speed through software -- a
> >> shell script or other utility maybe? I'd like some way to monitor cpu
> >> fan speed and get a notification if the fan quits unexpectedly.
> >
> > You need lm-sensors
> >
> >
> > run sensors-detect as root, agree with everything. Then,
> > [root at mail httpd]# LANG=C sensors
> > eeprom-i2c-0-51
> > Adapter: SMBus I801 adapter at e000
> > Memory type:            DDR SDRAM DIMM
> > Memory size (MB):       256
> >
> > eeprom-i2c-0-50
> > Adapter: SMBus I801 adapter at e000
> > Memory type:            DDR SDRAM DIMM
> > Memory size (MB):       256
> >
> > adm1025-i2c-0-2d
> > Adapter: SMBus I801 adapter at e000
> > +2.5V:     +1.48 V  (min =  +0.00 V, max =  +3.32 V)
> > VCore:     +1.48 V  (min =  +0.00 V, max =  +2.99 V)
> > +3.3V:     +3.30 V  (min =  +0.00 V, max =  +4.38 V)
> > +5V:       +5.08 V  (min =  +0.00 V, max =  +6.64 V)
> > +12V:      +0.00 V  (min =  +0.00 V, max = +15.94 V)   ALARM
> > VCC:       +3.27 V  (min =  +0.00 V, max =  +4.38 V)
> > CPU Temp:  +38.0 C  (low  =    +0 C, high =  +127 C)
> > M/B Temp:  +34.0 C  (low  =    +0 C, high =  +127 C)
> >
> > [root at mail httpd]#
> >
> > I have seen fan speed mentioned.
> >
>
> Word of warning.
>
> What I did find out about sensors is the accuracy of the voltages can be
> wrong.  Take note that this could give a false sense of security.  I had
> a PSU failing but sensors didn't read the voltage correctly.  I lost a
> DVD burner and almost lost a hard drive due to this.  You can play with
> the settings and calibrate the settings.
>
> I confirmed my settings with a good digital volt meter.
>
> I was reminded of this when I saw the ALARM in the above link.
> --
> Robin Laing
>

I ran sensors-detect as mentioned at the beginning of the thread and it
helped straighten out some temp issues I was seeing via the sensor applet. I
still don't have fan speed and such but i did not follow through on all the
instructions from sensors-detect which included( i  am not at the machine in
question) pasting something into the /etc/rc  . I wasn't really sure and
really didn't have time to do it. Anyone know if this will help with getting
the fan speed ?
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