Wow. I didn't think of running Kynseed on the integrated card. I just did and found out my situation is the same as yours, white screen with Nvidia card but runs fine with integrated card!
Recent community posts
The game starts but appears white even though I can hear the BGM and footsteps of the character.
I am on Windows 10 64-bit with graphic switchable graphic cards Intel HD Graphics 4600 and NVIDIA GeForce GTX 780M. My graphic drivers are not up to date because of other issues, I will update and see if it works.
Also did not have fraps running. No error.txt was generated nor did it count as a crash after I checked event logs.