What I found out is: there's no x64 driver for both AC'97 and ES1370 for Windows. 64bit Chipsets would have no AC'97, so there is only the Realtek driver which doesn't work well. And ES1370 is a very, very old audio chip which is probably only supported for legacy reasons but only in the 32bit versions of Windows. In the link from comment #4, the 32bit version of Windows was used.
See http://www.virtualbox.org/ticket/5332 which is essentially the same problem for VirtualBox. Can you confirm that Windows Update finds drivers for x32 but not for x64 versions of Windows? ** Bug watch added: Virtualbox Trac #5332 http://www.virtualbox.org/ticket/5332 -- KVM and audio driver in Windows 7 https://bugs.launchpad.net/bugs/419182 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to kvm in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs