I am upgrading my HTPC. My old setup was using onboard DVI-D
and optical SPDIF connected to my HDTV (HDMI in, optical in). This time around, I am using a new MB and a Gigabyte GV-NX84G256H video card for its DVI-I
(no onboard DVI) with the onboard optical SPDIF to the HDTV (same HDMI in, optical in as before). The video works fine, but no audio. I also tried the onboard line-out to the HDTV line-in, still no audio. As a test, I connected the onboard line-out to a set of speakers, and voila, AUDIO!. As another test, I connected the Gigabyte's component out to the HDTV with the optical audio, and voila, AUDIO!
It seems that the HDTV is being fooled into thinking that audio is coming in via the DVI-HDMI cable and thus ignoring its optical and line in. As I said, I did not have this problem with my old setup. The only difference is that the old MB was using DVI-D and the new video card is using DVI-I.
Any ideas? Thanks for the help.