Vega56, 99% working, garbled boot

[lmybobbob]

Hi,

I have a vega 56 (vega 64 vbios) that I pass-through to KVM, it's been working good, just some small issue:

1. Vega reset bug, this one I don't know if there is any easy fix, but if vega is not shut down properly or something it will hang. a full restart of host is required.

2. Garbled boot screen. Here is a image of how it looks after clover (attached in attachment)

3. Sometimes when I'm playing game, I would see some garble color stripe on screen horizontally. It just flashes once and doesn't seem to break anything. I can reproduce it with Quicktime -> Record screen -> start recording, and when it's recording and sometimes it will give out artifacts garbled color stripe.

 

I'm suspecting it is wrong frame buffer? However I'm not sure what to do or how to confirm the problem is.

Let me know what you think, thx.