我在虚拟框4.0.4中启动android vm（从froyo分支编译）时遇到以下错误
D/ALSAModule(1985)open called for devices 00000002 in mode 0...
E/ALSALib (1985)external/alsa-lib/src/pcm/pcm.c:2203:(snd_pcm_open_noupdate) Unknown PCM AndroidPlayback_Speaker_normal
E/ALSALib (1985)external/alsa-lib/src/pcm/pcm.c:2203:(snd_pcm_open_noupdate) Unknown PCM AndroidPlayback_Speaker
E/ALSALib (1985)external/alsa-lib/src/pcm/pcm.c:2203:(snd_pcm_open_noupdate) Unknown PCM AndroidPlayback
D/ (1985)[external/alsa-lib/src/pcm/pcm_hw.c]:snd_pcm_hw_prepare
I/ALSAModule(1985)Initialized ALSA PLAYBACK device default
似乎问题出在声音设备（或ALSA）上，但我不确定。任何帮助表示赞赏。