I just tried booting a newly installed workstation fedora 26
system. I have this video card:
01:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForce GTX 960] (rev a1)
The gome3 login screen comes up OK, but as soon as I
try to actually login, the screen goes to some wavy
pointilist looking thing and seems to freeze up.
I had to hit the reset button to get the system back.
I've tried no experimenting yet, but for a guess
wayland, nouveau, and the 960 don't hit it off very well
(and maybe the UHD resolution monitor contributes as well).
When I have a chance to fool with this tomorrow, I'll
try forcing an X11 login instead of wayland. Right now
I just set it to multi-user.target and am using the
text console when I boot to f26.