KMS but AMDGPU And Black Screen

[Seabass]

Recently setup a new computer.
Trouble is, every time I try to boot (popOS, about to try Ubuntu) it is just a black screen.

So I get to the boot loader and add the parameter “nomodeset”.
This is great, until I run AMD’s script to install the drivers. They will cancel saying it uses KMS. But I can’t boot without that being off initially...
anyone have any suggestions?
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