Mojave/Vega 56 - black second monitor

[koryum]

Hello,

I've updated my GPU from NVIDIA 970 to a Sapphire Vega 56 8Gb Pulse to get to Mojave from High Sierra.
I run dual displays and on High sierra with NVIDIA 970 I've got the 2 monitors running, after I changed to Vega 56 and updated to Mojave I only can have one monitor running.

- I've installed LILU and Whatevergreen
- The system recognise the GPU correctly
- If I start one monitor from different ports from the GPU, it work, if I plug 2 monitors, only one work.
- With 2 monitors plugged, it recognise the 2, but only one work, the other is flickering but black.

I searched and didn't find any answer, can you help me?

 

[juantasstic]

Hi! have you solved it? I have the same problem with my Vega 64

 

[koryum]

I have now updated to catalina and same problem as mojave as well.
I managed to get the tho monitors by enable IGPU on bios,only if I set it as the main graphics.
I can then have one monitor plugged into vega and another as the motherbord GPU.

I still doesnt have an answer to how to get the two monitor plugged into two vega outputs...