RG99
解決Audio聲音輸出不正常的問題
參照OpenDingux的解法，必須先播放dummy檔案，然後再開啟音效卡，步驟如下：
# Play a dummy WAV. # This fixes the audio hardware not working properly after reset. /usr/bin/aplay /usr/share/alsa/dummy.wav >/dev/null 2>&1 # Unmute DAC amixer -q -D hw:rs90audio cset "name='Master Playback Switch'" on