Article 57WF5 How to install KVM on a laptop with defective discrete GPU

How to install KVM on a laptop with defective discrete GPU

by
Cougar!
from LinuxQuestions.org on (#57WF5)
My Lenovo laptop's AMD Radeon discrete GPU has recently blown up. There's no entry in BIOS settings to turn off the discrete GPU so I used a LiveUSB and added "radeon.modeset=0" in default GRUB settings. Now my OS (Ubuntu 20.04) without KVM virtualization can boot up normally. Yet booting into KVM still cause computer to freeze.
Seems that KVM is still trying to virtualize the Radeon GPU.
What shall I do to stop KVM from virtualizing the defective GPU?

Another side question: it seems that Grub2 can only show in console mode. Does discrete GPU problem also affects GRUB2's functionality of displaying customized GUI-based boot menu?latest?d=yIl2AUoC8zA latest?i=hnAYCYuou-g:AgFL8BwHWcI:F7zBnMy latest?i=hnAYCYuou-g:AgFL8BwHWcI:V_sGLiP latest?d=qj6IDK7rITs latest?i=hnAYCYuou-g:AgFL8BwHWcI:gIN9vFwhnAYCYuou-g
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