RX 6600 – Black screen after one-key-hidpi, can’t boot macOS or installer

[WPN Lumia]

Hi all,
I’m stuck with a black screen issue on my Hackintosh after running one-key-hidpi to enable HiDPI scaling. 

Hardware

i7-7700K / Asus Z270-P

AMD RX 6600 (Navi 23)

SMBIOS: iMac20,1

Tahoe 26.0

I Ran one-key-hidpi, choose 2k resolution for hidpi, but after reboot → monitor has signal but stays black.

Tried so far :

Boot-args: agdpmod=pikera, -cdfon, radvesa, with/without debug=0x100 keepsyms=1. → Always ends in black screen.

Tried deleting overrides from Linux (apfs-fuse), UFS Explorer on Windows → could see files but couldn’t delete due to APFS snapshots.

Built new EFI (iMac20,1) with both WhateverGreen and NootRX, correct drivers (OpenRuntime.efi, HfsPlus.efi), still same issue and tried to boot new instalation from USB to get to terminal.

BIOS is set up correctly (iGPU off, 4G Decoding on, CSM/Secure Boot off).

Current situation

Can’t boot existing macOS (black screen after verbose).

Can’t boot USB installer (same result).

Effectively locked out of macOS.

Has anyone fixed RX 6600 black screen after HiDPI overrides? Any way to force-remove display overrides or force macOS to ignore EDID when both system and installer give black screen?