Don’t know yet what exactly causes this, I have to keep using an older kernel to avoid it. Started beginning kernel 5.2.0 and isn’t fixed yet in kernel 5.2.11 (just tried it). Starting from kernel 5.2.5 it gives me a black screen at startup. And booting from an older kernel gives me the oops you posted pictures of.
https://discussion.fedoraproject.org/t/kernel-5-2-5-200-fc30-x86-64-black-screen-after-login/2829/11
I’m on amd ryzen and found these bugs:
https://bugzilla.redhat.com/buglist.cgi?quicksearch=amd%20ryzen