GM: > Can someone explain why virtualbox 5.1.22-dfsg-2 works without debhelper > package (I haven't installed it at all) and 5.1.22-dfsg-3 requires > debhelper 10.6.4 and it is even not in a dependency. >
virtualbox is built using a tool can debhelper. debhelper had a bug in 10.6 up to 10.6.3 that caused virtualbox-dkms to miss files. This bug was fixed in debhelper 10.6.4, but virtualbox-dkms/5.1.22-dfsg-3 had still been built with debhelper 10.6.3 and therefore was still missing files. It needed a rebuild with a newer version of debhelper for that fix to be applied. Thanks, ~Niels
