SensorInstallHowto
⇤ ← Revision 1 as of 2005-10-09 06:29:30
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Ubuntu can monitor CPU and other system temperatures, fan speeds, and other system data, using an application called lm-sensors and another application to display lm-sensors's data on your desktop.
This Howto is from [http://www.ubuntuforums.org/showthread.php?t=2780 this Ubuntu Forums thread].
Install and Configure lm-sensors
Install lm-sensors using apt-get or the Synaptic GUI.
sudo apt-get install lm-sensors
Run the mkdev.sh script in the lm-sensors source. It is extacted below:
Copy the script file below to a text editor and save it to a file named mkdev.sh.
# 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
Make the file executable:
chmod 755 mkdev.sh
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---- #**********************************
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! #*****************************************
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.
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!>
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: +39°C (low = +15°C, high = +40°C) sensor = thermistor CPU Temp: +36°C (low = +15°C, high = +45°C) sensor = thermistor Temp3: +96°C (low = +15°C, high = +45°C) sensor = diode ************************************************** ********************
Reboot Ubuntu and the sensors should now be detected during the boot process properly!
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".
Get Sensor Information Displayed on your Desktop
Search Synaptic for either "xsensors" or "ksensors" and install either one. More configuration details coming!
SensorInstallHowto (last edited 2008-08-06 16:28:32 by localhost)