[jmgibson1981]

I did an upgrade to Leia recently and I've been chasing my tail on a problem. Mythtv playback on my living room htpc is washing out and out of sync with audio. I know that mythtv is fine as it's working perfectly in the bedroom and my laptop.

Only thing left is resolution. Living room tv is 4k. Are there any tweaks I can do to Leia to help smooth the playback? Everything local plays back fine, Seems to be 1080p live tv and recordings that have the issue. And I think it's a resolution or upscaling issue. Am confused and lost.

[disaacso]

This just reminded me of a problem I had with 4k on my tcl tv.  I had to manually set the tv for hdmi 2.0, and the cable had to be 2.0 rated, or else I had weird audio sync issues.  possibly you have something of this type occurring.

[jmgibson1981]

An update.

After much testing, both on Ubuntu 16.04 and 18.04, Kodi versions Krypton and Leia, Mythtv .28 and .29 I have determined that Ubuntu itself is the problem. I've run every combination I can think of. The consistent factor is Ubuntu 18.04. I have absolutely no idea how to trace this down as there appear to be no errors in any logs that I can find. I'm thinking an Xorg or Xrandr issue but that is an uneducated guess at best. I have no idea how to work on this problem because without errors one can't trace. All I have is symptoms. Mythtv playback on a 4k screen fails miserably on Ubuntu 18.04 for me regardless of Kodi or Mythtv versions.

All said and done, I have no upgrade path until 20.04. Heres hoping whatever it is is fixed by then. Marking solved as this is clearly not a Kodi issue.