>From [1] but we build on Fedora RPMFusion vbox server (the host part) on i686, is not supported ? but is working ? ... Can someone explain better this sentence [1] ? Thanks, [1] https://www.virtualbox.org/wiki/Downloads "Please also use version 5.2 if you still need support for 32-bit hosts, as this has been discontinued in 6.0." -- Sérgio M. B.