TL;DR I got a Radeon VII, has only legacy VGA init, not UEFI GOP init.
My mobo has bug such that it only supports UEFI GOP init, or so it seems. I tested with another GPU.
Can’t update Radeon VII VBIOS to support UEFI GOP, even though it exists, because my PC won’t boot with it in. (even with CSM on)
Already updated motherboard UEFI to latest.
So: Can I come to your place to update the VBIOS on the card?