https://www.virtualbox.org/report/27?sort=modified&asc=0&page=1
It is because virtualbox change enumerated ac97 from stac9200 in virtualbox 4.x to ad1980 in virtualbox 5.x
https:/ /www.virtualbox .org/report/ 27?sort= modified& asc=0&page= 1
It is because virtualbox change enumerated ac97 from stac9200 in virtualbox 4.x to ad1980 in virtualbox 5.x