Comment 71 for bug 1776563

I'm glad you did it.
Why does the kernel not find the correct addres like lspci? This is a good question. Maybe the kernel doesn't know what to search.
I have a somewhat fixed (not perfectly) DSDT/SSDT for A315-41G (Ryzen 5 + Radeon vega 8/Radeon 535) which provides a better cpu power management(CPU temperature can decrease under 50C) like using the kernel parameter only. If you send me a mail I can give it to you but I don't guarantee an error-free behavior.