As the title suggests I have no audio through HDMI on my g74sx. There is no HDMI device in my Sound device menu. I have tried multiple drivers, including the ATI realtek HDMI driver. Has anyone else had problems?
When I uninstalled the realtek drivers, microsoft installed 4 hdmi audio drivers, they were all greyed out and showed their status as unplugged. When I installed NVidia drivers the default microsoft HDI drivers became Nvidia HDMI, still non working. When I finally reinstalled realtek the HDMI devices disappeared and I went back to just having the Realtek Digital Device which does not transmit audio over HDMI.
In the properties for the Playback devices the correct audio output device should actually be named similar to your TV or AV system. For example I have a friend that has a Sony home theater system that he uses to switch devices on his TV. When I plug it in to the AV system, it shows up in my playback devices as a Sony AV system, and when I connect it directly to his TV it shows up as a Panasonic TV. Right-click that and click "Set as default device." Hopefully that should solve it.