I am having a problem with the fan speed with my new Dell Inspiron 5521 i7-3317U, Full HD with installed Ubuntu 12.04. The fan is too noisy.
After starting the Laptop, the fan starts and is not stopping or changing the revolutions at all. Still I didn't install any Windows just because the Laptop is new. What should I do: return the Laptop or will updating the BIOS will solve the Problem? I saw that there is a newer version of the BIOS: AO7.
I suggest you to use i8kutils, a collection of utilities for Dell laptops. In this collection there is i8kmon, which is the utility I'm actually using right now.
How To solve Dell laptops fan issues in Ubuntu
First of all, let's download and install i8kutils. Open your terminal and write:
sudo apt-get install i8kutils
Now you've got to add i8k to your modules. Open the modules file:
sudo gedit /etc/modules
and add the string "i8k" (without quotes) to the file. Save and exit.
sudo vim /etc/modprobe.d/i8k.conf
and fill it with this code:
options i8k force=1
Note: Some older guides will tell you to create a /modprobe.d/options file. The "options" file isn't used anymore on Ubuntu. What does matter is that you create a file with a .conf extension (the filename isn't important, but I decided to name it i8k.conf for clarity). So beware of older i8kmon configuration guides.
Now restart your computer, or run this code to make i8k run:
sudo modprobe i8k force=1
We will now create a i8kmon.conf file which will tell the i8kmon utility how to behave.
sudo gedit /etc/i8kmon.conf
Paste the following code in it:
This has been edited to match my Dell Inspiron 15r 5521 fan configuration (and I hope I did it well). If you want more informations take a look at the documentation on Ubuntu Manuals: http://manpages.ubuntu.com/manpages/gutsy/man1/i8kmon.1.html
Now you should be able to run i8kmon from your terminal and see if (and how) it's working. Simply run: