SDDM doesn’t start and have only a black screen !
I have two monitors and i’m using AMD gpus a Radeon Pro and the intergrated R7 gpu.
SDDM can be used if i restart it, but it won’t work when i boot.
This is definetly a bug .
Bugzilla report: #NNNN
Restart Slim or use another display manager , kdm doesn’t have this problem.