TC7 hangs at Starting Gnome Display Manager

[Chris Murphy]

Fedora-Live-Workstation-x86_64-22_Alpha-TC7.iso

When booting either x86_64 baremetal (EFI Mac) or vbox VM, I get an
indefinite hang at Starting GNOME Display Manager. I thought it was an
ATI thing, so I filed this:
https://bugzilla.redhat.com/show_bug.cgi?id=1197415

But I can reproduce this end result in a vbox VM also, even thought
the gdm-x-session messages are different. The vbox case says Fatal
server error: (EE) no screens found(EE).

I have no idea how the wayland gdm xorg problems manifest, and
honestly the logs don't contain useful information, even with
drm.debug=0x06. Question is whether this is known, and whether and how
I should provide more information, or reset the component correctly.


-- 
Chris Murphy