Topic: vboxuser numeric group ID changed, VirtualBox does not want to forget the old one.
I am running two boot environments (Solaris 11 and openindiana) as server, Linux NFS clients and VirtualBox with 3 different guests in both server BEs. Over all this, I maintain identical user IDs and identical numeric IDs for e.g. the group "users", to avoid complications.
In this spirit, I also changed the numeric value for vboxuser in one of the BEs from 100 to 1001, to have the same numeric ID in both BEs. As expected, thereafter USB was not available from any guest of that BE.
I then uninstalled VirtualBox, uninstalled the extension pack, reinstalled both in that BE, and reinstalled the guest additions in the test guest. But USB stayed unavailable in the guests until setting back vboxuser to 100 in that BE.
What should I remove/modify, that VirtualBox will forget about the numeric vboxuser ID?