00:00:01.274 Audio: Trying driver 'alsa'.
00:00:01.274 Audio: set_record_source ars=0 als=0 (not implemented)
00:00:01.284 ALSA: Failed to open 'default' as ADC
00:00:01.285 ALSA: Failed to open 'default' as ADC
00:00:01.288 ALSA: DAC frequency 44100Hz, period size 256, buffer size 1024
00:00:01.288 ALSA: Failed to open 'default' as ADC
00:00:01.289 ALSA: Failed to open 'default' as ADC
00:00:01.289 AC97: WARNING: Unable to open PCM IN!
00:00:01.289 AC97: WARNING: Unable to open PCM MC!
00:00:01.289 Console: VM runtime error: fatal=false, errorID=HostAudioNotResponding message="Some audio devices could not be opened. Guest applications generating audio output or depending on audio input may hang. Make sure your host audio device is working properly. Check the logfile for error messages of the audio subsystem."