I haven't been able to boot with no params with 1.13. bios, but now I
can make it work with:

"text radeon.modeset=0 amdgpu.runpm=0 mem_encrypt=off
ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 rcu_nocbs=0-7 idle=nomwait
acpi_enforce_resources=lax"

With these params everything works fine - gpu, suspend/resume, touchpad,
function keys, normal cpu usage ....

Secure boot, enabled, also.

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

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

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