2017-03-23, 22:01
I exactly run the same versions you do. Same vaapi 1.7.3, same kernel, same xorg drivers. I have no explanation for your problem.
Set your projector to Limited, Disable Adjust Refreshrate To match video. Set kodi to limited. Set xrandr to full. Make sure Prefer VAAPI Render Method is enabled.
Set your projector to Limited, Disable Adjust Refreshrate To match video. Set kodi to limited. Set xrandr to full. Make sure Prefer VAAPI Render Method is enabled.