When I try to run QEMU on Ubuntu Mate, I see these error messages: pulseaudio: set_sink_input_volume() failed pulseaudio: Reason: Invalid argument pulseaudio: set_sink_input_mute() failed pulseaudio: Reason: Invalid argument
Trying to play an audio file in the guest fails. The guest freezes for a few seconds. I was using the usb audio card on qemu-system-ppc. It was running in kvm mode on PowerPC hardware.