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Fan speed control in Fedora 25 for a ThinkPad T420

asked 2017-06-06 04:59:01 -0500

michanical gravatar image

Hi, I'm new here. I hope I'm asking on the right place, otherwise I apologize but I need to find someone to help me I didn't find any solution yet.

Simply - I'm running Fedora25 on laptop Lenovo Thinkpad T420. And I'm having some issues with Fan speed according to CPU thermals. Fan is simply too loud in comparison to the way Windows 7 was originally handling the Fan rpm

Example: when watching YouTube video, Fan rpm hangs at around 3800rpm (quite loud) with CPU temps at around 55-60°C on Linux.

On Win7 it's a different story. Playing the same YouTube video Fan runs at aprox 2500-3000rpm (sometimes even completely OFF when there is no multimedia type of work) with CPU temps around 60-70°C (which is completely fine for a laptop).

for monitoring under Fedora I used program TLP (with additional features installed for ThinkPads). And for a Win7 I used program called TPFanControl.

So is there any way to change how the Linux is handling the Fan speeds?

also it would be great if someone who knows any tips for better power savings could post them. Last time I was watching a movie with 30% left on a battery charge and it burns through it in just a couple of seconds! :( (using aprox. 7800mAh 9cell battery)

Thnaks! Michal

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answered 2018-12-12 23:58:29 -0500

updated 2018-12-23 09:02:40 -0500

Fedora and ThinkPad Suport Fan control system.

A. install lm_sensors and thinkfan work for ThinkPad [F29 or Lower]

# dnf install lm_sensors
# sensors-detect
# systemctl enable fancontrol
# systemctl start fancontrol

B.install Think Fan Driver

# dnf install thinkfan
# thinkfan-0.9.3-6.fc29.x86_64

C. fan control using a configuration with in lm_sensors - pwmconfig

easy configuration, there's a script named pwmconfig which lets you interactively write your configuration file for fancontrol. Alternatively you can write this file yourself using the information from man page

For ThinkPad and Fedora User written by simmon

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Asked: 2017-06-06 04:59:01 -0500

Seen: 1,067 times

Last updated: Dec 23 '18