This is no longer a problem in sddm. There seems to be a bug in ubuntu-drivers-common (on in systemd) that prevents gpu-manager from creating the following file:
/var/lib/ubuntu-drivers-common/requires_offloading
As a result, nvidia-prime, won't see the need of offloading rendering, and you will boot into a black screen. I've filed LP: #1443364 about it.
Assuming that you're affected by the same problem, for now you can do the following:
sudo systemctl stop sddm
sudo systemctl start gpu-manager
sudo systemctl start sddm
This is no longer a problem in sddm. There seems to be a bug in ubuntu- drivers- common (on in systemd) that prevents gpu-manager from creating the following file:
/var/lib/ ubuntu- drivers- common/ requires_ offloading
As a result, nvidia-prime, won't see the need of offloading rendering, and you will boot into a black screen. I've filed LP: #1443364 about it.
Assuming that you're affected by the same problem, for now you can do the following:
sudo systemctl stop sddm
sudo systemctl start gpu-manager
sudo systemctl start sddm