blacklist original module in /etc/modprobe.d/backport.conf which lists in .blacklist.map (original module and backport version's name may different so it's a "map") to avoid conflict with the backport versions in updates/
blacklist original module in /etc/modprobe. d/backport. conf which lists in .blacklist.map (original module and backport version's name may different so it's a "map") to avoid conflict with the backport versions in updates/