lm_sensors for SME

14^th May 2005 Ian Wells

Thanks to Reinhold and wififun

Introduction

This page only covers installation, please also see lm_sensors for SME

Three installation methods are described in these pages

• Installation of the original Redhat 7.3 lm_sensors RPM
• Installation of the latest available lm_sensors RPM
• Installation from source

Installation

Download the RPM: http://download.atrpms.net/production/packages/redhat-7.3-i386/atrpms/lm_sensors-2.9.1-39.rh7.3.at.i386.rpm
If this link is broken use the link above it and download the latest rpm.

1. Install the RPM

# rpm -Uvh lm_sensors-2.8.7-0_32.rh7.3.at.i386.rpm

2. Detect the sensors on your mainboard, (run as root)

# /usr/sbin/sensors-detect

For my mainboard, I just hit enter for all questions, which then uses the defaults which can be seen as CAPs.

3. Note down the lines it suggests to put into /etc/modules.conf, for my mainboard it indicated

#----cut here----
# I2C module options
alias char-major-89 i2c-dev
options it87 ignore=-1,0x290
#----cut here----

4. Modify /etc/modules.conf via a template fragment

• Make the templates-custom directory.

# mkdir -p /etc/e-smith/templates-custom/etc/modules.conf

• Create a new template for i2c, using pico or your favourite editor.

# pico /etc/e-smith/templates-custom/etc/modules.conf/10i2c

• Copy the lines from step 3 into this file, for my mainboard this file contains.

{
    foreach my $line
        (
          "alias char-major-89 i2c-dev",
          "options it87 ignore=-1,0x290",
        )
    {
        unless (exists $lines{$line})
        {
            push @lines, $line;
        }
    }
    "";
}

• Expand the template.

# /sbin/e-smith/expand-template  /etc/modules.conf

5. Set up and start the service.

  # ln -s /etc/rc.d/init.d/e-smith-service /etc/rc7.d/S86lm_sensors
  # /sbin/e-smith/config set lm_sensors service status enabled
  # /sbin/service lm_sensors start

Notes

On one test PC the temperature could not be displayed from running sensors, but it was read correctly in Sysmon. My research came up with the following which appears appropriate:
User had an old kernel module (2.6.5) with recent user-space tools (2.8.6), which was causing the problems

/etc/sysconfig/lm_sensors contains the list of modules to be loaded. Unnecessary modules can be removed, however the list must stay numbered from 0 without gaps. For details of how to identify which modules are required look at http://www2.lm-sensors.nu/~lm78/identify.html

Further Information

Now return to lm_sensors for SME

Copyright © 2005 Ian Wells : The original can be found from http://www.wellsi.com/sme : Please send additions & corrections to me.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Text and no Back-Cover Text. A copy of the GNU Free Documentation License is available from the Free Software Foundation at http://www.fsf.org/copyleft/fdl.html.