as you should notice that driver use ac97->num to access different codecs
iaputword(chip, reg + ac97->num * 0x80, val); res = iagetword(chip, reg + ac97->num * 0x80); but virutalbox does not response correctly when driver try to accesss secodary ac97 codecs when it only emulate single primary ac97 codec -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1487168 Title: [Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider problem To manage notifications about this bug go to: https://bugs.launchpad.net/virtualbox/+bug/1487168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs