It maybe worth checking with one or more of the mainline kernels to see
if these behave differently from the Ubuntu kernel just to see if they
boot fine or if they suffer from the same issue.

The mainline kernels can be found in https://kernel.ubuntu.com/~kernel-
ppa/mainline

For example, it may be worth installing the initial 5.8 kernel release
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8/ - use the
following:

https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8/amd64/linux-headers-5.8.0-050800-generic_5.8.0-050800.202008022230_amd64.deb
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8/amd64/linux-headers-5.8.0-050800_5.8.0-050800.202008022230_all.deb
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8/amd64/linux-image-unsigned-5.8.0-050800-generic_5.8.0-050800.202008022230_amd64.deb
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8/amd64/linux-modules-5.8.0-050800-generic_5.8.0-050800.202008022230_amd64.deb

If this boots OK, then maybe then try the latest mainline 5.8 kernel in
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8.18/

Failing that, it may be worth trying the mainline kernels from 5.5..to
5.7 too to see when the issue starts to occur.

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https://bugs.launchpad.net/bugs/1904054

Title:
  kernel 5.8 general protection fault at boot

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