Fedora 29 XFCE4 wm, fresh install
Latest 4.19.9 and 4.19.10 kernels, after update booted into blank screen, I thought, that it is, because of darkest time here, 5h20min daylight :) :). But found somewhere from net solution. I have laptop HP 15-bw021na, with AMD 4 core processor, AMDGPU. Had to add into linux cmdline AMDGPU.DC=0, after that booted OK. Now, something with these "new" kernels is going wrong? because with 4.19.5 kernel does not need amdgpu.dc=0 command.
So, if someone counter same problem, this might help.
Happy Holidays
Jarmo