How did you install Virtualbox? Is it virtualbox-nonfree? Or did you get it from the Virtualbox website? Or is it the Ubuntu package?
Can you verify the version of Virtualbox you're running?
How did you install Virtualbox? Is it virtualbox-nonfree? Or did you get it from the Virtualbox website? Or is it the Ubuntu package?
Can you verify the version of Virtualbox you're running?