When starting game engine

ALSA lib pcm.c:7236snd_pcm_recover) underrun occured
ALSA lib pcm.c:7236snd_pcm_recover) underrun occured
AL lib: pulseaudio.c:382: Context did not get ready: Connection refused
ALSA lib pcm.c:7236snd_pcm_recover) underrun occured
ALSA lib pcm.c:7236snd_pcm_recover) underrun occured
......................................................

infinite complaints. Any problem with pulseaudio?