Why there is black screen when the double GPU is working together?

[tedyage]

Hello!
My laptop has two graphic cards, one is AMD Radeon 535, the other is an integrated graphic card.
Today, I encoded my test mp4 file to HEVC H.265, and used your demo to play that video. Something weird happened when I used a high-performance mode in which both of my graphic- cards work together, it always in the black screen, but when I used an eco-mode in which only the integrated graphic card works, the video is played.
I am confused about that, and I want it played with my AMD graphic card, I have no idea why it is like that, and how to deal with it.
Could you please help me to find out the key of this problem? It will be a great favor to me.

[adrenak]

Hi @tedyage , do you have this I'm not at all familiar with the C++ code that this project uses and have only made the C# wrapper