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My battery remains for about 2.5 hours on ubuntu, but in Windows it remains for about 7 hours, how to expand battery life on ubuntu ?, or how to turn off Nvidia GPU ?

My laptop: Lenovo Legion 5 15ACH6, AMD Ryzen 7 5800H, NVIDIA RTX 3050 Ti

Obaida Na
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2 Answers2

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Note: I am using Ubuntu 22.04

I have the exact same model (15ACH6) with the same specs. I searched a lot, and finally found this tool which successfully disabled the Nvidia GPU for me: https://github.com/geminis3/EnvyControl

For it to work, first install the proprietary Nvidia drivers. Then, reboot. Then, run the following 2 commands:

sudo prime-select on-demand 
sudo systemctl disable gpu-manager.service #to prevent gpu-manager from interfering.

Now, clone the repo and run the following command:

sudo python3 envycontrol.py -s integrated
sudo reboot #And then reboot

You will have your Nvidia GPU disabled. You can verify it using this command:

lspci -nn | grep -E 'VGA|Display' #It shouldn't show Nvidia

However, note that, even after disabling Nvidia GPU, my power consumption didn't decrease a lot. From 20W, it came down to about 15W. I measured it using powertop. Let me know how much it reduces for you.

shivams
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I've had a similar experience with this laptop on Pop!_OS 22.04. When on battery power, running in Hybrid or Integrated Graphics mode barely mattered.

What did have a radical impact was setting up powertop as described here: How do I make Powertop changes permanent?

I'd assumed that powertop was merely for reporting, similar to top. But it's actually also a utility for fixing power-consumption problems as well.

Christian Convey
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