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09-18-2011 11:23 PM
04-04-2012 06:29 PM
Hey! You essentially have two sound cards, including the HDMI. First, make sure you're using the ATI graphics card, and not the Intel, when you want to use the HDMI.
Next, go to Windows Control Panel\Sound
On the playback tab (which shows by default), WHEN YOUR HDMI IS PLUGGED IN AND WORKING, you should see two playback devices: Your internal sound card/speakers, and the AMD HDMI. All you need to do is switch between the playback device you want the sound to be channelled to. You can switch this at any time. I do this when watching in the other room via my projector, or in my comp. room. Just select the HDMI sound device and choose the button on bottom-middle "Set Default". This will change the "default device" tag to below the HDMI playback device. To reset, either unplug the HDMI, or switch it here. This is always the first place you should look when you have sound issues.
Because I switch quite often, I have a shortcut link on my desktop to this sound menu, for quick switching.
If this doesn't work, make sure you have drivers for your ATI video card installed. Check you exact model and make sure your bios is up to date. They have made for switchable graphics now, which is much preferable to the previous auto-detect switch. The drivers are updated, as well. The latest HP drivers for the ATI were released in November. You can install these, then install the latest AMD/ATI Mobility Video Driver package over the top to make sure you have the latest video drivers. Either of these packages includes the HDMI audio driver, which you may not have installed.