Comment 19 for bug 1905591

Same problem with Legion 5 pro, 5800H+3070.

https://www.reddit.com/r/GamingLaptops/comments/ls9k5r/legion_5_pro_other_info_64gb_ram_upgrade_linux/

This guy claims that after 'upgrading to Kernel 5.10', 'Blacklisting noveau drivers', 'changing the .conf file' and 'adding modules in initramfs', brightness control works. https://www.notion.so/Legion-5-Pro-Regolith-Important-Steps-2c468d1b33cc481dbd92d5ea59a6b74b

Will try this later. So far I have tried changing .conf and adding modules in initramfs and it didn't work.