For those who maybe interested..GOT IT WORKING on Vbox 5.2.27. did not try on version 6.0 builds
> DISTRIB_DESCRIPTION="Ubuntu 16.04.6 LTS" Xenial
> Linux 4.4.0-146-generic #172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019 x86_64
https://www.virtualbox.org/wiki/Testbuilds
Downloaded test build Linux 64-bit 5.2.x revision 129666 Downloaded Guest Additions 5.2.x revision 129666
For those who maybe interested..GOT IT WORKING on Vbox 5.2.27. did not try on version 6.0 builds
> DISTRIB_ DESCRIPTION= "Ubuntu 16.04.6 LTS" Xenial
> Linux 4.4.0-146-generic #172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019 x86_64
https:/ /www.virtualbox .org/wiki/ Testbuilds
Downloaded test build Linux 64-bit 5.2.x revision 129666
Downloaded Guest Additions 5.2.x revision 129666