Use dedicated GPU in laptop (AMD)

Hi,

I have a laptop (Dell Inspiron) with an integrated GPU (Intel HD 5500) and a dedicated AMD GPU.

I have added the code from this StackOverflow answer to my game but it is still using my Intel GPU unless I manually set it in the AMD Radeon software. Obviously, I cannot expect that from the average customer.

Any ideas?

Edit: Now it's working and I don't understand why. And I don't know if it will work in the future or not.