Hi!
I'm interested in a similar topic. Namely, I am running Ubuntu 18.4.4 on a computer with both iGPU (Intel Core i5) and dGPU (GeForce GTX 1050). I believe I have it configured the right way, i.e., on Full it uses the dGPU and 3 CPUs, on Medium the dGPU and 2 CPUs, and on Light only a single CPU. My issue is that while the dGPU is in use, the graphics are extremely slow, especially scrolling, making it impossible to work. I had no such issues on a similar machine without a dGPU, where no lags were noticeable even on Full. Hence the question: is it possible to have the dGPU handle FAH only and use the iGPU for rendering graphics? As far as I can tell, both are enabled and producing video output, but currently both suffer from these lags. Thanks in advance!