I have a Lenovo Thinkpad E420 (1141BRG) (Intel i3-2330M) laptop for 4 years now, and I have a problem with fan controlling and as a consequence overheating problems.
This happens on Linux Mint 17.2Mate-64bit now, and did the same with Ubuntu 14.04 last year. On Windows everything works fine.
I have installed the thinkfan program and I cannot make use of it through bash commands and, even more, I cannot setup the GUI.
The Psensor program monitors my CPU. I have searched for the compatibility of this laptop with Mint (http://community.linuxmint.com/hardware) but did not find a simillar issue from others...