Hello,
I did install Ubuntu 16.04.1 up to date as of 2016-11-9 and Kodi Jarvis 16.1(GIT:c327c53), installed using command line and followed that guide. This is clear install no skins, no addons.
I did installed Audio decoder add-on packages.
I am not using an GPU only my CPU intel Celeron 847
I would post my debug log but it is not like something is crashing so I don’t know if there is a point in that.
Problem is with passing HDMI to user Kodi. When I am logged in as my default user kodi works fine with sound over hdmi, however when it is automatically login in during boot as Kodi user and starting Kodi, there is no sound. In the system menu two options which I can see are:
Default, Default Output Device (PULSEAUDIO)
Built-in Audio Analogue Stereo Headphones (PULSEAUDIO)
When logged in as other user in Kodi I can see:
Default, Default Output Device (PULSEAUDIO)
Built-in Audio Digital Stereo (HDMI), HDMI / DisplayPortHeadphones (PULSEAUDIO)
I did create user with these options
# usermod -a -G cdrom,audio,video,plugdev,users,dialout,dip,input kodi,netdev
The only thing I did worng was I did try all the options before going to last one in section two, but then I did revert some changes.