alt Hacker NewsThe driver that initialises your plug-in GPU is shipped in flash on the card, is signed by Microsoft, and won't run unless that signature validates.
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tsimionescu • 08/01/2025
Doesn't that happen only after UEFI starts the boot process, and only if Secure Boot is enabled?
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I am reticent to argue with someone of your reputation, but AFAIK UEFI can initialize a basic framebuffer (and write to it) in a standardized manner without needing any ROM on the card.
https://wiki.osdev.org/GOP