Thinkpad E590 big sur OpenCore almost success.. need help in brightness and power management

Thinkpad E590 big sur OpenCore almost success.. need help in brightness and power management

https://preview.redd.it/ey0poqbwo8z61.png?width=1366&format=png&auto=webp&s=5fcd0e72e88c7e9c007c3ad6233567bcf43d258a

Hardware

CPU - intel core i7 8th gen 8565U - whiskeylake

GPU - intel UHD620 and radeon rx550x(not supported up to my knowledge)

Ram - 8GB DDR4

Laptopmodel - Thinkpad E90

Audio codec - apple alc 15

Ethernet card - Realtek gigabit ( supporting )

wifi/bt card - intel ac9260 (working)

Guide followed - Dortania

I got issue with - brightness of built in display. the monitor is showing as built in display apple laptop but the brightness slider is missing

and I would like to get some advice on power management

Files - EFI is attaching in the description with smbios specifics removed Smbios model ( MacBook 15,2)

https://www.dropbox.com/sh/2jsng1i327rmdp5/AACpG7Inmg71vlRLNURRl2ZUa?dl=0

Extra infö - I am a beginner please help me

https://preview.redd.it/so1desbwo8z61.png?width=1366&format=png&auto=webp&s=f6a62870a74aa354ec212b112353538c57ffa0f9

submitted by /u/ishvnukp
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