Backlight not working on Ventura 13.6.7, Intel UHD620

Hello people, i got my Ventura working. But for some reason backlight doesnt turn on, even after 5 minutes. I tried using flags:

keepsyms=1 debug=0x100 -igfxblr -igfxbls -igfxbrs -igfxonln=1 -lilubeta -alcbeta -wegnoegpu

As well as: keepsyms=1 debug=0x100 -igfxblt -igfxbls -igfxonln=1 -lilubeta -alcbeta -wegnoegpu

And keepsyms=1 debug=0x100 -igfxblr -igfxbls -igfxonln=1 -lilubeta -alcbeta -wegnoegpu

Yet none of them work. The flags initially did work in the installer though, which is strange. Also, Sonoma doesnt have this problem.

My EFI is on GitHub

submitted by /u/gnu-stallman
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