"dummy output" sound driver

[Phlip]

I started a new Ubuntu project with a hardware emergency, and I had to build a new Ubuntu platform in VirtualBox on my daughter's netbook (Win7 32bit).

The sound just plugged and played - I never even had to look at its settings.

Then I got a new notebook (Lenovo Win7 64-bit), and I exported the Ubuntu as an appliance and imported it.

Now the sound driver (in the Mixer popup) is "Dummy Output", and it doesn't make sound.

Version numbers & /etc/ cats available on request!

[stefan.becker]

And what are the guest settings for audio (type of soundcard etc.)?