Hallo,
was bringen die virtualbox additions?
Sind das diese Pakete?
sea virtualbox|grep add
virtualbox-guest-dkms - x86 virtualization solution - guest addition module source for dkms
virtualbox-guest-source - x86 virtualization solution - guest addition module source
virtualbox-guest-additions - transitional package for virtualbox-guest-additions-iso
virtualbox-guest-additions-iso - guest additions iso image for VirtualBox