R9 380x Dual Monitor Problem in High Sierra

[Serbinhio]

Hello Guys,

So, I had a really good installation in Sierra with everything running, but by the time I updated to high sierra i cannot connect my second monitor! Mac recognizes it but it still has a black screen. My setup is:

Monitor 1 = Main monitor. Connected via HDMI - HDMI.
Monitor 2 = Second monitor. Connected via DVI - VGA.

I have the LiLu and Whatevergreen kexts installed, and I even tried a suggestion from here: https://www.tonymacx86.com/threads/dual-monitor-setup-not-working.232966/#post-1592088

Also, when I boot with both the monitors connected to the card, only the second monitor opens with a green layer on top of everything, and the first monitor just stays black until I reboot.

My card is the 4GB Sapphire Nitro Version if this has any matter.

Thank you in advance

 

[Serbinhio]

So, I have tried to modify my framebuffer, and I face two problems.

1. If I select to inject the Lagotto Framebuffer to Clover, it does nothing when I connect a second monitor. It doesn't recognise the second one at all.
2. If i do not select to inject the framebuffer but I just add the patch info for my card to the AMD9000Controller, it recognizes the second monitor and it switches my main screen into the second one, but the physical second screen does nothing.

Please give me some help. :/

 

[birvana]

I have the same problem. Only HDMI works, let me know if you find a solution.