After updating VirtualBox to 6.0 I had a problem with starting the virtual machines – RTR3InitEx failed with rc=-1912 (rc=-1912). How to resolve this?
1. remove older version of VirtualBox packages
dnf remove VirtualBox* kernel-devel-*
2.install packages:
dnf install binutils qt5-qtx11extras libxkbcommon gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-devel dkms
3. install the new version – e.g.
dnf localinstall VirtualBox-6.0-6.0.4_128413_fedora29-1.x86_64.rpm
4. run as root
/sbin/vboxconfig