Description of problem:
Installed a default KDE system from F20 Alpha TC5 DVD. After reboot no initial setup window is shown, just KDE login manager.

The log says:
Sep 10 09:20:46 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!qxl_surface_create: Bad bpp: 1 (1)
Sep 10 09:20:46 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!kwin(767): Couldn't start kglobalaccel from kglobalaccel.desktop:  "KLauncher could not be reached via D-Bus. Error when calling start_service_by_desktop_path:
Sep 10 09:20:46 localhost.localdomain xinit[443]: The name org.kde.klauncher was not provided by any .service files
Sep 10 09:20:46 localhost.localdomain xinit[443]: "
Sep 10 09:20:46 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!kwin(767): No ksycoca4 database available!
Sep 10 09:20:46 localhost.localdomain xinit[443]: kwin(767)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType  "KWin/Script"  not found
...
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(767): OpenGL driver recommends XRender based compositing. Falling back to XRender.
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(767): To overwrite the detection use the environment variable KWIN_COMPOSE
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(767): For more information see http://community.kde.org/KWin/Environment_Variables#KWIN_COMPOSE
Sep 10 09:20:47 localhost.localdomain xinit[443]: QObject::connect: Cannot connect (null)::resetCompositing() to KWin::Compositor::restart()
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(767): Failed to initialize compositing, compositing disabled
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(767): Consult http://techbase.kde.org/Projects/KWin/4.0-release-notes#Setting_up
Sep 10 09:20:47 localhost.localdomain xinit[443]: error: XDG_RUNTIME_DIR not set in the environment.
Sep 10 09:20:47 localhost.localdomain xinit[443]: qxl_surface_create: Bad bpp: 1 (1)
Sep 10 09:20:47 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!qxl_surface_create: Bad bpp: 1 (1)
Sep 10 09:20:47 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!kwin(969): Couldn't start kglobalaccel from kglobalaccel.desktop:  "KLauncher could not be reached via D-Bus. Error when calling start_service_by_desktop_path:
Sep 10 09:20:47 localhost.localdomain xinit[443]: The name org.kde.klauncher was not provided by any .service files
Sep 10 09:20:47 localhost.localdomain xinit[443]: "
Sep 10 09:20:47 localhost.localdomain xinit[443]: kdeinit4: Aborting. $HOME not set!kwin(969): No ksycoca4 database available!
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(969)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType  "KWin/Script"  not found
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(969): No ksycoca4 database available!
Sep 10 09:20:47 localhost.localdomain xinit[443]: kwin(969)/kdecore (trader) KServiceTypeTrader::defaultOffers: KServiceTypeTrader: serviceType  "KWin/Effect"  not found
Sep 10 09:20:47 localhost.localdomain xinit[443]: [<class 'pyanaconda.ui.gui.spokes.user.UserSpoke'>, <class 'pyanaconda.ui.gui.spokes.network.NetworkSpoke'>, <class 'pyanaconda.ui.gui.spokes.datetime_spoke.DatetimeSpoke'>, <class 'pyanaconda.ui.gui.spokes.password.PasswordSpoke'>]
Sep 10 09:20:48 localhost.localdomain xinit[443]: /bin/firstboot-windowmanager: line 25: kill: (767) - No such process
Sep 10 09:20:48 localhost.localdomain xinit[443]: /bin/xinit: connection to X server lost
Sep 10 09:20:48 localhost.localdomain xinit[443]: waiting for X server to shut down kwin: Fatal IO error: client killed
Sep 10 09:20:48 localhost.localdomain xinit[443]: kwin: Fatal IO error: client killed
Sep 10 09:20:48 localhost.localdomain xinit[443]: Disabling FB access for 0
Sep 10 09:20:48 localhost.localdomain xinit[443]: (EE) Server terminated successfully (0). Closing log file.
Sep 10 09:20:49 localhost.localdomain systemd[1]: Started Initial Setup configuration program.

I used a KVM-based VM with Spice and QXL.

Version-Release number of selected component (if applicable):
initial-setup-0.3.7-1.fc20.noarch

How reproducible:
always

Steps to Reproduce:
1. install KDE system from F20 Alpha TC5 DVD
2. reboot
3. see no initial setup, but sddm