VirtualBox seems to be a different story. Try adding "nosmap" to the kernel command line (see http://askubuntu.com/questions/581301/virtualbox-stuck-on-starting-virtual-machine ), that worked for me.
VirtualBox seems to be a different story. Try adding "nosmap" to the kernel command line (see http:// askubuntu. com/questions/ 581301/ virtualbox- stuck-on- starting- virtual- machine ), that worked for me.