Comment 34 for bug 1776563
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| AaronMa (mapengyu) wrote Re: Acer Aspire A315 ACPI failure on Ubuntu 18.04, kernel hangs, can't load, kernel freeze (AMD Ryzen 5/Radeon/Raven) | #34 |
Hi Richard:
This issue should be related to the buggy BIOS ivrs table.
Kernel panic when found no southbridge device ID.
Could you try boot kernel with "amd_iommu_dump=1 amd_iommu=off" (remove other kernel parameters you tried to solve this issue).
If it works, please attach the dmesg here.
I will try to make a kernel patch to make kernel boot with irq map disabled instead of panic.