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i have a new Intel Mainboard DH67GD with the latest BIOS version (BIOS-Version/ Intel Corp. BLH6710H.86A.0110.2011.0415.1506, 15.04.2011).
I have also the latest grafic(188.8.131.521) and sound (184.108.40.20663) driver for Windows 7 x64. HDMI with sound works fine. I have bought 2 different displayport to hdmi adapters, but with both i have no sound over displayport (video is ok). I tried different BIOS settings (primary video port diplayport ON and OFF, audio over hdmi/displayport = ON and OFF) with no luck. The Realtek HD Audio Manager shows only digital Output and digital Output (optical).
The Windowws device manager shows a Intel Display-Audio device.
Any thoughts ideas?