I have a Fedora 20 virtualbox guest installed on a Windows 7 host. Recently I found the host machine lost sound device and couldn't play any music sometimes. When this happened, I saw the guest Fedora 20 is using the sound device by looking at the Windows Volume Mixer. But actually nobody plays any music on the Fedora guest at that time. I only use it to run a console application without any needs for sound.
So how to prevent virtualbox guest from using the host sound card?
From the host and guest settings, which audio controller I should select if I don't want to completely disable the Audio for the guest? Intel HD Audio should be the right one? My host is a Lenovo W540 laptop.
My host sound settings:
The guest audio settings:
With the Intel HD Audio the virtualbox guest does still prevent host applications from using the sound device even there is nobody actually use sound device on the guest.
My virtualbox version is 5.0.26. not too old.