I do have a front audio jack on my computer case. There's a cable in my computer case going from that front audio port to my motherboard. That cable has 2 ends, without opening my case and if I remember correctly one is HDA HD and the other end is AC '97, I tried both ends and I also tried not plugging it. Same problem. I'm not entirely sure about all of this, if you think the problem is likely with this cable, let me know and I will re-test it again.
I do have a front audio jack on my computer case. There's a cable in my computer case going from that front audio port to my motherboard. That cable has 2 ends, without opening my case and if I remember correctly one is HDA HD and the other end is AC '97, I tried both ends and I also tried not plugging it. Same problem. I'm not entirely sure about all of this, if you think the problem is likely with this cable, let me know and I will re-test it again.