I can now identify the problem as being with one or more of the xorg-x11-* packages. 

I am fully updated with the exception of
* kernel 4.0 packages
* ksysguard-libs (yes, I prefer Ksysguard!)
* oxygen-icon-theme
(none of those are signed currently)
* xorg-x11-* packages.
.. and it works fine.  But as soon as I install xorg-x11-* packages.and reboot, the VM cannot paint the login screen.

-- Peter

On Tue, Feb 24, 2015 at 2:21 AM, Adam Williamson <adamwill@fedoraproject.org> wrote:
On Sun, 2015-02-22 at 13:23 +0100, Peter Laursen wrote:
> I was merely asking if this was intentional or an oversight. Or if I
> possibly completely misunderstood what could be the reason for the
> problem.
> As soon as the signing problem with new packages has been solved (so
> that
> Yum will let me install)

You can just pass --nogpgcheck . This is what Rawhide was doing for
you anyway. We really ought to ship fedora-repos with gpgcheck
disabled until Bodhi enablement, though, whoever does the fedora-repos
package updates is out of sync with the actual releng process, it
makes no sense to flip the gpgcheck switch before we're actually
signing everything.
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net

Hilsen / Regards

Peter Laursen