Hi all, I do not know if this question is still relevant, but I will share a method I was able to cope with this problem. I read this thread and noticed the mention of the file aticfx64. I also had to play version 1.7.3 on a laptop with an AMD APU and a HD 8750M discrete graphics card. Since the built-in video core is switched to Legacy, it is not possible to update the driver. It was possible to solve this problem by playing games via embedded graphics card, but I was not happy with it for obvious reasons. Some time ago I experimented with different versions of Windows and found that KSP and other Unity games run and work correctly on 8.1. But I didn't want to sit on 8.1 for a couple of games so I went back to 10. However, I still had a backup of the drivers from 8.1 and decided to take the aticfx64 file from there. I replaced it in windows/system32 in safe mode and KSP worked. Also I ran UBOAT but I can't test Subnautica because I don't have it.
https://drive.google.com/file/d/1XYMQX7POjwZXXeZYvInKTUg5RN39uuBJ/view?usp=sharing