>>>>> On Mon, 8 Feb 2016 16:04:27 +0100, Christian Linden 
>>>>> <lindoma...@gmail.com> said:

    > Client gets installed fine -> reboot -> blank screen with cursor in the 
upper left corner or if again booting via pxe -> „FATAL: INT18: BOOT FAILURE“.
    > I assume Vbox doesn’t find GRUB for whatever reason.. I give up..
Did you checked this?
http://www.dedoimedo.com/computers/fedora-fatal-18.html

-- 
regards Thomas

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