I have recently got a thinkpad p50s and put Ubuntu 16.04 on it. The fan is constantly running even when i am just browsing the internet. Output from Psensou
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Installing TLP – Linux Advanced Power Management may help by managing resources used by your machine.
See tlp power management for installation instructions, but here they are for convenience:
sudo add-apt-repository ppa:linrunner/tlp
sudo apt update
sudo apt install tlp tlp-rdw
sudo start tlp
Additionally, you can also install the following for your ThinkPad.
- Battery charge thresholds – ThinkPads only
- Recalibrate battery – ThinkPads only
These may provide additional help with your fan problem by managing battery charging (which may be contributing to heat in your laptop chassis).
You can install these optional packages using:
sudo apt install tp-smapi-dkms acpi-call-dkms

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sudo apt install tlp
to install a base set of power mangement tools (you should edit '/etc/default/tlp' to customize tlp for your application) – Charles Green Nov 07 '17 at 16:52