Strange issue with a newly setup pc with a Radeon 6450 card. HDMI output works however I can't change adjust the volume. Adjusting the volume upd and down in Win7 and in MCE has no effect. To me this implies the HDMI audio output is fixed level however I can't figure out how its like that or how to change it. Any suggestions? There are no other audio devices installed, including the motherboard audio which is disabled. ATI HDMI audio is the default and only audio device listed, but I can't change the volume level.
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2/9/12 at 10:45pm