https://bugs.freedesktop.org/show_bug.cgi?id=89405
--- Comment #1 from fosero@gmail.com --- Maybe unrelated, but there seems to be issue initializing given gfx chip when running anything non X.
On a fresh boot trying to run any wayland session (weston directly or current stable gdm) results in just a black screen. No obvious error in the logs. Booting with plymouth enabled also just results in a black screen.
However when X is started first any subsequent wayland session shows just fine.