Script not working on fresh installed Ubuntu 20.04 (Windows UEFI dual boot)

[alvaro-gh]

Hey, I found out about the fn keys issue as everyone else and ended up here. I downloaded the script, replaced both occurrences of /bin/sh, and ran with sudo ./fix.sh --grub-setup-dsdt, I even tried the sed command but nothing happened. I'd like to help but I have no idea how to troubleshoot this.
Some data about this installation:

Linux <redacted> 5.11.0-37-generic #41~20.04.2-Ubuntu SMP Fri Sep 24 09:06:38 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

BIOS Information
        Vendor: LENOVO
        Version: R1AET37W (1.13 )
        Release Date: 04/09/2021

Is it because I'm not using kernels 5.8 or 5.9?
Thanks for your time.

[masksshow]

Hi. This is very strange. Usually on Ubuntu there is no problem.
Have you tried reading what the console output is, maybe there are errors there.
I have Ubuntu, I tested only on 5.8 and 5.9

[alvaro-gh]

Closing this since not even the battery charge was working correctly. I'll wait until Lenovo decides to fix this. Thanks for replying masksshow :)