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The 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.
by mjg59 1y ago
The 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.
- tsimionescu 1y agoDoesn't that happen only after UEFI starts the boot process, and only if Secure Boot is enabled?
- mjg59 1y agoI don't understand what "UEFI starts the boot process" means? The firmware is what initialises the hardware. If the code needed to initialise your GPU doesn't have a trusted signature then it won't be executed, and you won't have any working graphics, so you won't have a UI to let you disable secure boot. If secure boot isn't enabled in the first place then yes this isn't a problem.
- ThePowerOfFuet 1y agoI 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 https://wiki.osdev.org/GOP
- mjg59 1y agoThe GOP driver is provided by the card, and then exposes a standardised interface to the firmware.