I had installed Ubuntu 17.10 with xorg as default display driver. I had nvidia-384 drivers and everything worked, no issues.
I have upgraded the system today from 17.10 to find out that my default session is wayland on Nouveau drivers. I tried to switch to xorg but the screen freezes and I can't login. If I install latest nvidia-390 drivers and try to login with wayland it ends up in a endless Start job has been started and I can't get to gdm login screen.If I use it with open source drivers everything is choppy and doesn't work well.
Any ideas why xorg is not default like it suppose to be, and why I can't run GDM with xorg?