chromeos-autofanctrl

Chromeos fan control script, for chromebooks with fan speed problems.

Description

When my Asus Flip CX5 chromebook gets hot, it spins up its fans. After a while the chromebook cools down, but the fans keep spinning at 60% speed, even with the cpu at 40°C. This script resets the fan control every 5 seconds, so the fans function as intended. The install script will create a new directory under /usr/local/ and download all the required files. Then it will setup a service that runs on startup and executes the command sudo ectool autofanctrl every 5 seconds. From my testing this script has absolutely no impact on the system, except making the fans behave correctly.

Read before installing

This script requires the chromebook to be in developer mode. It will also disable boot verfication and remount the system partition as read/write. This is needed to modify the system and add a new service to it. However this will make the system more insecure. To be precise this will make the system as secure as a regular linux installation(so still pretty secure). Do your own research if you are unsure about this.

Installation

1. Chromebook must be in developer mode.
2. Press ctrl+alt+t to open the terminal, then type shell and press enter.
3. Paste sudo curl -L "https://raw.githubusercontent.com/Gareth40342/chromeos-autofanctrl/main/install.sh" | sudo bash into terminal and press enter.
4. After the chromebook reboots run sudo curl -L "https://raw.githubusercontent.com/Gareth40342/chromeos-autofanctrl/main/install.sh" | sudo bash -s -- -rebooted in the terminal.

Post-install

The script needs to be reinstalled after every update.

Todo:

• Reinstall automatically after system update