I've tried to find a solution to this but haven't been able to yet. I'm using ubuntu 12.04 installing using wubi installer. I have no audio. I can see the sound icon on the bar on top and interact with it. It doesn't say mute, it seems normal. "Codec:" /proc/asound/card*/codec* proc/asound/card0/codec#0:Codec: IDT 92HD75B3X5 proc/asound/card0/codec#1:Codec: LSI ID 1040 proc/asound/card1/codec#0:Codec: ATI R6xx HDMI Alsa shows all bars full for IDT 92HD75B3X5, no bars for ATI HDMI. Please help. I've reinstalled all drivers as well.