Unable to adjust the fan speed in Linux.

**Hadassah** · 14-01-2011

I am using the Linux operating system from the last couple of days and as I am new to this I am facing lots of problems. Actually the thing here is that the Fan speed of my system is seems to be 100% and it is not reducing at all which was not the same when I was using windows 7. I mean to say that when I was using the windows 7 operating system then the speed use to vary and now it is giving me more than expected which is very strange. So please someone let me know how I can solve this issue.

**Ernesto4** · 14-01-2011

Well it is strange that the fan is running continuously on the same speed, I am using the Linux operating system from last few months and I have faced any issues such. And if you are getting the fan speed high without harming the system then it is well and good. So what you have to do in this case is that just see whether you can adjust the fan speed manually through the system and if yes then you can adjust the same according to the system usage.

**Enriqueta** · 14-01-2011

Most modern motherboards are equipped with sensors to monitor the supply voltages, CPU temperature or the housing and the rotational speed of the CPU fan or case.To access this information, you must install the package lm-sensors and run the detection sensors:

Code:

$ Sudo aptitude install lm-sensors
$ Sudo sensors-detect

Respond by accepting the default answer to every question.Then reboot your PC. Once done, you can use a program like gkrellm or conky to monitor your sensors.

**Elieis** · 14-01-2011

I have gone through the problem that you are facing and I guess I can help you in this case, what you have to do here is that just install a handy little utility fancontrol. With a lot of motherboards, the CPU fan speed can be controlled by PWM ( Pulse Width Modulation ) which is a technique for varying the speed of a DC motor, varying the pulse width that he applies.With the tool fancontrol contained in the package lm-sensor s, it is possible to link the pulse width and thus the fan speed to the CPU temperature. In many cases it is possible to drastically reduce the speed of the fan without risk to the processor. To help you, lm-sensors package also contains a utility for configuring fancontrol:

Code:

$ sudo pwmconfig $ Sudo pwmconfig

. This program will stop and restart each fan so that you can determine which fan should be controlled. It will also ask you how fast the fan should turn to such a temperature, minimum and maximum. Use the defaults or try your own, make tests, you will not be disappointed with the results it is possible to obtain.Once you determine your ideal values or when you test, do not forget to restart the fan control by:

Code:

$ / Etc / init.d / restart fancontrol

Simple to use, this utility may render a great service for those who like me have a machine with a fan, especially in summer, makes a noise A380 takeoff.