How to forcibly turn off faulty hardware before the system is tuned?

Question

linux

I got a relatively old laptop with two video cards from amd. As a result of overheating, the discrete one is actually faulty.
How to forcibly disable a faulty discrete graphics card while retaining the ability to use the built-in one?
* There is no option in bios to disable the discrete graphics card.
* There is an option to block the radeon module (and firmware), after loading via acpi_call, turn off the video card, and use the laptop as a file cleaner / server.
* New kernels (fresh arch) do not hang the system when booting with the driver and almost work (framebuffer):
a) either lucky and discrete video and backlight falls off when the system boots and then everything works fine with embedded video.
b) either you are unlucky and systemd-udev eats one core, some services do not start, and the system becomes useless.

Answer 1

chop off hardware (with a hoop)
or https://habrahabr.ru/post/94032/