the problem is the residual configuration of the virtualbox provided by oracle
rc virtualbox-4.2
4.2.16-86992~Ubuntu~precise amd64Oracle VM VirtualBox
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just remove it works
** Changed in: virtualbox (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1692200
Title:
do-release-upgrade from 14.04 failed
To manage no
It turned out that it was more complicating than the above.
I had to use the update-rc.d to disable and remove any vbox* and
virtualbox under /etc/init.d.
But this didn't solve the problem either. I had to manually move these
files outside the /etc/init.d (this is equivalent to deleting them but
Ok the problem was the vboxdrv.
While virtualbox was removed,
the vboxdrv was supplied by the virtualbox-dkms package (which was not removed).
Therefore removing manually virtualbox (again) and virtualbox-dkms (explicitly)
removes everything.
Then reinstalling virtualbox solved the problem.
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