Found out that some more people – as seen in my quote some posts above, or here

I want to use an USB audio device with the Pi2. After installing it, no games are started anymore. The following error i can see quickly on the screen:

lvl0: VolumeControl::init() – Failed to find mixer elements
[/quote]got this message, but both seem to have a soundcard…but why do I get this error without a soundcard?

And more important – how to fix it?