I have a home theatre pc that is connected to and AVR (Yamaha V6A) via an HDMI cable. The audio and video come from the on-motherboard graphics system on the HTPC. The HTPC is running Ubuntu linux.
Ubuntu allows me to configure the sound output in through the HDMI cable in one of 3 ways: digital stereo, digital surround 5.1, or digital surround 7.1.
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The issue I am experiencing is that when the sound output is digital surround 5.1 or 7.1, there will be random gaps in the audio - random, short blanks spots in the audio. However, if I set the sound output to digital stereo the audio gap issue doesn't happen, but in digital stereo there is no sound coming out of my center channel speaker.
The issue is not the AVR (audio and video work fine when the source is a blu-ray player). I am wondering if the motherboard in the HTPC (ASUS H97M-E/CSM) might not be capable of keeping up with the digital surround data stream.
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Has anyone had similar issues with digital audio/video over HDMI that is coming from the on-board graphics unit of the motherboard? Maybe my motherboard is simply not up to the task? Perhaps I need a graphics card in the PC?
I suppose the problem could be with the way Ubuntu is using the motherboard, and I just need to correct a setting.