[gentoo-user] Re: lm_sensors problem

[Harm Geerts]

On Monday 13 February 2006 03:26, Allan Spagnol Comar wrote:
> Hi all,
>
> I had installed lm_sensors and kernel modules, now when I run sensors
> command I got:
>
> monstro ~ # sensors
> it8712-isa-0290
> Adapter: ISA adapter
> VCore 1:   +1.41 V  (min =  +1.42 V, max =  +1.57 V)   ALARM
> VCore 2:   +0.00 V  (min =  +2.40 V, max =  +2.61 V)   ALARM
> +3.3V:     +6.53 V  (min =  +3.14 V, max =  +3.46 V)   ALARM
> +5V:       +5.00 V  (min =  +4.76 V, max =  +5.24 V)
> +12V:     +11.84 V  (min = +11.39 V, max = +12.61 V)
> -12V:      -4.17 V  (min = -12.63 V, max = -11.41 V)   ALARM
> -5V:      -13.64 V  (min =  -5.26 V, max =  -4.77 V)   ALARM
> Stdby:     +4.89 V  (min =  +4.76 V, max =  +5.24 V)
> VBat:      +3.12 V
> fan1:        0 RPM  (min =    0 RPM, div = 8)
> fan2:        0 RPM  (min = 3013 RPM, div = 8)          ALARM
> fan3:     6750 RPM  (min = 3013 RPM, div = 8)
> M/B Temp:    +35 C  (low  =   +15 C, high =   +40 C)   sensor = thermistor
> CPU Temp:    +40 C  (low  =   +15 C, high =   +45 C)   sensor = thermistor
> Temp3:       +27 C  (low  =   +15 C, high =   +45 C)   sensor = thermistor
>
> how you all can see VCore2 is unavailable and -5 and -12 information
> seems to be switched,
>
> does anyone had a clue about it, I am running on a nvidia4 base
> motherboard.

You'll need to change some settings in /etc/sensors.conf for your sensor chip.
Your output seems a lot like mine with a default config so I'll paste the 
relevant part of my config, I have a Asus A8N SLI-Deluxe with a 
it8712-isa-0290.

After you've modified /etc/sensors.conf you need to run `sensors -s` for the 
changes to take effect. You also need to run `sensors -s` after a reboot.
Unless you use the sensors init.d script you can add that command 
to /etc/conf.d/local.start

# cat /etc/sensors.conf

chip "it87-*" "it8712-*"

# Modified for Asus A8N SLI-Deluxe

# Voltage monitors as advised in the It8705 data sheet

    label in0 "VCore 1"
    label in1 "VCore 2"
    label in2 "+3.3V"
    label in3 "+5V"
    label in4 "+12V"
    label in5 "-5V"
    label in6 "-12V"
    label in7 "Stdby"
    label in8 "VBat"

    # vid is not monitored by IT8705F
    # comment out if you have IT8712
    ignore  vid
    ignore  in1

# Incubus Saturnus reports that the IT87 chip on Asus A7V8X-X seems
# to report the VCORE voltage approximately 0.05V higher than the board's
# BIOS does. Although it doesn't make much sense physically, uncommenting
# the next line should bring the readings in line with the BIOS' ones in
# this case.
# compute in0 -0.05+@ , @+0.05

# If 3.3V reads 2X too high (Soyo Dragon and Asus A7V8X-X, for example),
# comment out following line.
#    compute in2   2*@ , @/2
#
    compute in3 ((6.8/10)+1)*@ ,  @/((6.8/10)+1)
    compute in4 ((30/10) +1)*@  , @/((30/10) +1)
# For this family of chips the negative voltage equation is different from
# the lm78.  The chip uses two external resistor for scaling but one is
# tied to a positive reference voltage.  See ITE8705/12 datasheet (SIS950
# data sheet is wrong)
# Vs = (1 + Rin/Rf) * Vin - (Rin/Rf) * Vref.
# Vref = 4.096 volts, Vin is voltage measured, Vs is actual voltage.

# The next two are negative voltages (-12 and -5).
# The following formulas must be used. Unfortunately the datasheet
# does not give recommendations for Rin, Rf, but we can back into
# them based on a nominal +2V input to the chip, together with a 4.096V Vref.
# Formula:
#    actual V = (Vmeasured * (1 + Rin/Rf)) - (Vref * (Rin/Rf))
#    For -12V input use Rin/Rf = 6.68
#    For -5V input use Rin/Rf = 3.33
# Then you can convert the forumula to a standard form like:
    compute in5 (7.67 * @) - 27.36  ,  (@ + 27.36) / 7.67
    compute in6 (4.33 * @) - 13.64  ,  (@ + 13.64) / 4.33
#
# this much simpler version is reported to work for a
# Elite Group K7S5A board
#
#   compute in5 -(36/10)*@, -@/(36/10)
#   compute in6 -(56/10)*@, -@/(56/10)
#
    compute in7 ((6.8/10)+1)*@ ,  @/((6.8/10)+1)

    set in0_min 1.4 * 0.95
    set in0_max 1.4 * 1.05
    set in1_min 2.4
    set in1_max 2.6
    set in2_min 3.3 * 0.95
    set in2_max 3.3 * 1.05
    set in3_min 5.0 * 0.95
    set in3_max 5.0 * 1.05
    set in4_min 12 * 0.95
    set in4_max 12 * 1.05
    set in5_max -5 * 0.95
    set in5_min -5 * 1.05
    set in6_max -12 * 0.95
    set in6_min -12 * 1.05
    set in7_min 5 * 0.95
    set in7_max 5 * 1.05
    #the chip does not support in8 min/max

# Temperature
#
# Important - if your temperature readings are completely whacky
# you probably need to change the sensor type.
# Adujst and uncomment the appropriate lines below.
# The old method (modprobe it87 temp_type=0xXX) is no longer supported.
#
# 2 = thermistor; 3 = thermal diode; 0 = unused
#   set sensor1 3
#   set sensor2 3
#   set sensor3 3
# If a given sensor isn't used, you will probably want to ignore it
# (see ignore statement right below).

    label temp1       "CPU Temp"
    set   temp1_over  50
    set   temp1_low   15
    label temp2       "MB Temp"
    set   temp2_over  45
    set   temp2_low   15
#    ignore temp3
    label temp3       "Temp3"
    set   temp3_over  40
    set   temp3_low   15

# The A7V8X-X has temperatures inverted, and needs a conversion for
# CPU temp. Thanks to Preben Randhol for the formula.
#   label temp1       "CPU Temp"
#   label temp2       "M/B Temp"
#   compute temp1     (-15.096+1.4893*@), (@+15.096)/1.4893

# The A7V600 also has temperatures inverted, and needs a different
# conversion for CPU temp. Thanks to Dariusz Jaszkowski for the formula.
#   label temp1       "CPU Temp"
#   label temp2       "M/B Temp"
#   compute temp1     (@+128)/3, (3*@-128)

# Fans
    set fan1_min 0
    set fan2_min 3000
    ignore fan2
    ignore fan3
    set fan3_min 3000
-- 
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