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How can I install TLP in Ubuntu 18.04?
November 11, 2018
Edited: December 29, 2018
November 24, 2022
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You are reading old instructions off the internet.
tlp is included in Ubuntu’s universe repository so all you need to type is:
sudo apt install tlp
If you want to utilize the Radio Wizard also use:
sudo apt install tlp-rdw
Thinkpad users can install optional packages for battery threshold levels:
sudo apt-get install tp-smapi-dkms acpi-call-dkms
Source: Welcome to TLP!