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Thread: HOW TO: Install and configure lm-sensors

  1. #1
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    HOW TO: Install and configure lm-sensors

    Howto Install and Configure lm-sensors
    ========================

    1. Install lm-sensors using apt-get or the Synaptic GUI.

    sudo apt-get install lm-sensors


    2. Run the mkdev.sh script in the lm-sensors source. It is extacted below:

    a. Copy the script file below to a text editor and save it to a file named mkdev.sh.

    #!/bin/bash

    # Here you can set several defaults.

    # The number of devices to create (max: 256)
    NUMBER=32

    # The owner and group of the devices
    OUSER=root
    OGROUP=root
    # The mode of the devices
    MODE=600

    # This script doesn't need to be run if devfs is used
    if [ -r /proc/mounts ] ; then
    if grep -q "/dev devfs" /proc/mounts ; then
    echo "You do not need to run this script as your system uses devfs."
    exit;
    fi
    fi

    i=0;

    while [ $i -lt $NUMBER ] ; do
    echo /dev/i2c-$i
    mknod -m $MODE /dev/i2c-$i c 89 $i || exit
    chown "$OUSER:$OGROUP" /dev/i2c-$i || exit
    i=$[$i + 1]
    done
    #end of file

    b. Make the file executable:

    chmod 755 mkdev.sh

    c. Run mkdev.sh from the current directory

    sudo ./mkdev.sh


    3. Now run sensors-detect and answer YES to all YES/no questions. I generally use the ISA bus rather than the SMBus bus, your choice to this question!. At the end of the detection phase, a list of modules that needs to be loaded will displayed. You will need to write these down or print the list for the next steps.

    sudo sensors-detect

    Below is an example of results from sensors-detect:
    #************************************************* *****************************
    To make the sensors modules behave correctly, add these lines to
    /etc/modules:

    #----cut here----
    # I2C adapter drivers
    i2c-viapro
    i2c-isa
    # I2C chip drivers
    eeprom
    it87
    #----cut here----

    Then, run /etc/init.d/module-init-tools

    To make the sensors modules behave correctly, add these lines to
    /etc/modprobe.d/local and run update-modules:

    #----cut here----
    # I2C module options
    alias char-major-89 i2c-dev
    #----cut here----
    #************************************************* *******************************


    4. In this example, we add the modules in reverse order (order is critical!) in "/etc/modules".

    #************************************************* ***********************
    # /etc/modules: kernel modules to load at boot time.
    #
    # This file should contain the names of kernel modules that are
    # to be loaded at boot time, one per line. Comments begin with
    # a "#", and everything on the line after them are ignored.

    psmouse
    mousedev
    ide-cd
    ide-disk
    ide-generic
    lp

    #For lm-sensors, i2c modules
    it87
    i2c-viapro
    i2c-isa

    #end of file!
    #************************************************* ****************


    4. I found that there was no "/etc/modprobe.d/local" and that "alias char-major-89 i2c-dev" was already listed in "/etc/modprobe.d/aliases". So, nothing to do here.


    5.Now load the modules manually using modprobe and update the dependencies.

    sudo modprobe i2c-sensor
    sudo modprobe i2c-viapro
    sudo modprobe i2c-isa
    sudo modprobe it87

    sudo depmod -a <may not be needed!>
    sudo update-modules <may not be needed!>


    6. Now test the sensor output using the lm-sensors utility "sensors".

    sensors

    ************************************************** *****************
    it87-isa-0290
    Adapter: ISA adapter
    VCore 1: +1.57 V (min = +1.42 V, max = +1.57 V) ALARM
    VCore 2: +2.66 V (min = +2.40 V, max = +2.61 V) ALARM
    +3.3V: +6.59 V (min = +3.14 V, max = +3.46 V) ALARM
    +5V: +5.11 V (min = +4.76 V, max = +5.24 V)
    +12V: +11.78 V (min = +11.39 V, max = +12.61 V)
    -12V: -19.14 V (min = -12.63 V, max = -11.41 V) ALARM
    -5V: +0.77 V (min = -5.26 V, max = -4.77 V) ALARM
    Stdby: +5.00 V (min = +4.76 V, max = +5.24 V)
    VBat: +3.12 V
    fan1: 3668 RPM (min = 0 RPM, div =
    fan2: 0 RPM (min = 664 RPM, div = ALARM
    fan3: 0 RPM (min = 2657 RPM, div = 2) ALARM
    M/B Temp: +39C (low = +15C, high = +40C) sensor = thermistor
    CPU Temp: +36C (low = +15C, high = +45C) sensor = thermistor
    Temp3: +96C (low = +15C, high = +45C) sensor = diode
    ************************************************** ********************

    7. Reboot Ubuntu and the sensors should now be detected during the boot process properly!

    8. The sensor output may be tweaked by editing the "/etc/sensors.conf" file. It is possible to correct inacurate scaling too. For details check "man sensors.conf.
    Last edited by emperor; November 1st, 2004 at 06:27 PM.
    linxos.com hllug.org bubbasgeek.com
    100% Linux/BSD @Home: Ubuntu -hp6810,Desktop,Server,MythTV. hpdm4. M0n0WALL -fw/router.

  2. #2
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    Re: HOW TO: Install and configure lm-sensors

    EXCELLENT howto man - I had been struggling with this using the debian method but this worked without issue. Thanks again!

  3. #3
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    Re: HOW TO: Install and configure lm-sensors

    Works great, I was looking for something like this for overclocking...
    But I did not understand what you said about the reverse order in /etc/modules. What exactly should be reversed ?

    BTW, if you want a graphical output, try installing the "xsensors" package which uses lm-sensors.

  4. #4
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    Dapper Drake

    Re: HOW TO: Install and configure lm-sensors

    Well I gess I got it working for once but when I type in "sensors" mine comes out differant from your

    Code:
    eeprom-i2c-0-51
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256
    
    eeprom-i2c-0-50
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256

  5. #5
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    Re: HOW TO: Install and configure lm-sensors

    Quote Originally Posted by Rule
    Well I gess I got it working for once but when I type in "sensors" mine comes out differant from your

    Code:
    eeprom-i2c-0-51
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256
    
    eeprom-i2c-0-50
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256
    is this your full output? if yes, something went wrong

    it should look like this:
    Code:
    woifi@homer:~ $ sensors
    Philips PAL_BG -i2c-2-61
    Adapter: bt878 #0 [sw]
    
    MSP3410D-i2c-2-40
    Adapter: bt878 #0 [sw]
    
    eeprom-i2c-2-50
    Adapter: bt878 #0 [sw]
    Unknown EEPROM type (0)
    
    w83627hf-isa-0290
    Adapter: ISA adapter
    VCore 1:   +1.74 V  (min =  +1.76 V, max =  +1.94 V)       ALARM
    VCore 2:   +1.25 V  (min =  +1.76 V, max =  +1.94 V)
    +3.3V:     +3.22 V  (min =  +3.14 V, max =  +3.47 V)
    +5V:       +4.87 V  (min =  +4.76 V, max =  +5.24 V)
    +12V:     +12.71 V  (min = +10.82 V, max = +13.19 V)
    -12V:     -12.77 V  (min = -13.18 V, max = -10.80 V)
    -5V:       -5.55 V  (min =  -5.25 V, max =  -4.75 V)
    V5SB:      +5.51 V  (min =  +4.76 V, max =  +5.24 V)
    VBat:      +3.17 V  (min =  +2.40 V, max =  +3.60 V)
    fan1:        0 RPM  (min = 3199 RPM, div = 2)
    fan2:        0 RPM  (min = 3040 RPM, div = 2)
    fan3:        0 RPM  (min = 13500 RPM, div = 2)
    temp1:       +25C  (high =   +15C, hyst =    -3C)   sensor = thermistor 
    temp2:     +32.5C  (high =   +80C, hyst =   +75C)   sensor = thermistor 
    temp3:     -46.0C  (high =   +80C, hyst =   +75C)   sensor = thermistor 
    vid:      +1.850 V
    alarms:   Chassis intrusion detection                      ALARM
    beep_enable:
              Sound alarm disabled
    
    eeprom-i2c-0-51
    Adapter: SMBus Via Pro adapter at 0400
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256
    
    eeprom-i2c-0-50
    Adapter: SMBus Via Pro adapter at 0400
    Memory type:            DDR SDRAM DIMM
    Memory size (MB):       256
    hth

    woifi

  6. #6
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    Dapper Drake

    Re: HOW TO: Install and configure lm-sensors

    well I did see some failures maybe thats why, i'm on an Averatec 6100 laptop. I also noticed in my bios it doesnt even tell me the temps

    EDIT: when I try to run sensors-dectect and hit enter a few time I get

    Code:
     Sorry, no chips were detected.
     Either your sensors are not supported, or they are
     connected to an I2C bus adapter that we do not support.
     See doc/FAQ, doc/lm_sensors-FAQ.html, or
     http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/doc/lm_sensors-FAQ.html
     (FAQ #4.24.3) for further information.
     If you find out what chips are on your board, see
     http://secure.netroedge.com/~lm78/newdrivers.html for driver status.
    also I attatched some of the errors I got before
    Attached Files Attached Files
    Last edited by Rule; January 17th, 2005 at 01:48 PM.

  7. #7
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    Unhappy Re: HOW TO: Install and configure lm-sensors

    eeprom-i2c-0-51
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type: DDR SDRAM DIMM
    Memory size (MB): 256

    eeprom-i2c-0-50
    Adapter: SiS96x SMBus adapter at 0x0c00
    Memory type: DDR SDRAM DIMM
    Memory size (MB): 256



    The same output for me..

    Adapter: SMBus Via Pro adapter at 5000
    Memory type: DDR SDRAM DIMM
    Memory size (MB): 256

    eeprom-i2c-0-50
    Adapter: SMBus Via Pro adapter at 5000
    Memory type: DDR SDRAM DIMM
    Memory size (MB): 256
    Last edited by barbarian; January 17th, 2005 at 06:55 PM.

  8. #8
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    Re: HOW TO: Install and configure lm-sensors

    Noob qestion, but could You notice which place should I put mkdev.sh? usr/share/lmsensors?

  9. #9
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    Re: HOW TO: Install and configure lm-sensors

    Quote Originally Posted by barbarian
    Noob qestion, but could You notice which place should I put mkdev.sh? usr/share/lmsensors?
    You are just going to run the "mkdev.sh" file once, prior to executing sensors-detect.

    I put the script file in a sub-directory in my home directory. However, for permanent storage, it can be put almost anywhere you have prev's.
    linxos.com hllug.org bubbasgeek.com
    100% Linux/BSD @Home: Ubuntu -hp6810,Desktop,Server,MythTV. hpdm4. M0n0WALL -fw/router.

  10. #10
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    Re: HOW TO: Install and configure lm-sensors

    Ok, thanx, I'll give a try once more..

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