ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: Connection refused
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused
alsa: Could not initialize DAC
alsa: Failed to open `default':
alsa: Reason: Connection refused
audio: Failed to create voice `pcspk'
qemu-system-x86_64: Initialization of device isa-pcspk failed: Initializing audio voice failed
solution：
設置環境變量：
export QEMU_AUDIO_DRV=none