Comment 5 for bug 1666664

Regarding X regression, it's actually not a problem: By default nvidia drivers disable modesetting, and when modesetting is disabled, gnome-shell with gdm fail to load in wayland mode, falling back to Xorg and we are back with LP:#1559576 and LP:#1632322.

If modesetting is enabled, then gdm starts during boot in the Wayland mode, but when you try to login in gnome-shell Xorg dession, it crashes the same way as in those two tickets.

This is definitely an initialization problem. Maybe it has something to do with the fact, that Xorg starting in rootless mode and some changes are needed?