Enabling lm-sensors in Dapper Drake

krussell · 08-15-2006, 05:49 AM

Hello :-)
Anybody used lm-sensors in Ubuntu Dapper? i need some help on it.
firstly, while botting the 'settingup sensor limit" fails.
secondly, when i try "sensors-detect" the system suggests that i use mknod/mkdev to create /dev/something (i am in a window$ pc now).
what should i do to enable lm-sensors?

BrianK · 08-15-2006, 10:52 PM

I'd like to take credit for this, but I found it on the Ubuntu forum:

Quote:

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

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

the important bit is #2. Without it, sensors-detect doesn't work. Kinda lame that Ubuntu comes this way. such is life. Once it's done, just follow the prompts in sensors deetct & you shoudl be on your way.

note: I've never found a computer that needed to modprobe eeprom to make sensors work. If anything, eeprom garbles the output, so I tend to leave it out even though sensors detect almost always puts it in.

krussell · 08-20-2006, 01:33 AM

Quote:

Originally Posted by BrianK

I'd like to take credit for this, but I found it on the Ubuntu forum:

It worked like a charm.
From my end FULL CREDIT to you for this.
Thanks BrianK.

gauthamk · 02-25-2008, 07:52 AM

Thank for u r help.Good work