Critical to update vbox guest additions after update to 5.2

[Kevin Oberman]

I have discovered that incompatibilities between 5.1 and 5.2, at least for
Windows7 guests, may leave virtualbox in an state where the pointer is
non-operative and the keyboard is locked to the vbox guest. I tried
everything I could think of, but could not restore access to the host
system. This only happened after working within the guest and then trying
to switch back to using FreeBSD.

I tried <Rt. CTRL> and got a pop-up that the pointer could be connected to
the guest by clicking in the guest window or selecting the "Connect"
button. Neither worked. The pointer would not work on either host or guest.
The keyboard worked on the guest (Windows7), but could not be returned to
the host (FreeBSD 11.1).

Eventually I switched to a vty and killed vbox. I then rebooted the guest
and immediately update the guest additions. Since then I have had no
problems.

Bottom line is to update the guest additions immediately after updating
virtualbox-ose to 5.2.
--
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman at gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683