Kernel can be started even with noapic but two sensors will be missing
and the advanced touchpad functions will not work.

!!!This line is not here: This is the reason of CONFIG_VGA_SWITCHEROO=n
compile time kernel parameter.

There is an another problem: this notebook has two GPUs and amdgpu (or the 
kernel, I don't know) can not handle this correctly so gpu switching has to be 
disabled
!!!But here: This is the reason of CONFIG_VGA_SWITCHEROO=n compile time kernel 
parameter.

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https://bugs.launchpad.net/bugs/1776563

Title:
  Acer Aspire A315 ACPI failure on Ubuntu 18.04, kernel hangs, can't
  load, kernel freeze  (AMD Ryzen 5/Radeon/Raven)

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