I have this device and it works very well generally - I'm running HDMI to my receiver then on to my LCD panel, using HDMI sending LPCM multichannel (no passthru, I want it to decode not the amp)
However, occasionally when I start a video the receiver will start by detecting the LPCM, then a few seconds later drop it and shows as if there is no audio being received, then randomly comes in and out. Sometimes it will settle down other times audio stops permanently. I've tried different HDMI ports with the same behaviour, and my Chromecast plugged into one of these HDMI ports never displays this behaviour, so I don't believe its the receiver. I've tried several different HDMI cables, with the same results.
Its difficult to reproduce on demand. Sometimes I'll go several days without it happening, then it happens quite a bit on different video files in a row. I haven't noticed any specific correlation to a particular source audio format, it seems to happen on both DTS/DD type files as well as AAC, although its hard to be sure because I can't force it to do it. The only thing I've found to be helpful (usually) is simply power down and restart and that usually fixes it up for the problematic files. I may be imagining it, but it seems to start happening after I haven't rebooted in days.
I've looked in dmesg, etc but can't really see any HDMI or pulseaudio specific errors/warnings. Has anybody got any suggestions on what might be wrong?
Is it worth doing all this
https://wiki.ubuntu.com/PulseAudio/Log to see if PA is having a problem? Would greatly appreciate any help!
Running Kodi 15.2 on Ubuntu 14.04.3 LTS using pretty much default settings (I haven't removed Pulseaudio, just used Ubuntu sound settings and pavucontrol to set volumes and hardware output device.