Hi,
I just installed LibreElec on old but still working Acer Aspire 5930g.
I have a problem with sound - when I select HDMI audio output internal speaker plays also.
I discovered that when I set output to spdif and then to hdmi then internal speakers stops to play.
It looks like a bug but maybe there is some way to resolve it with conf?
Btw:
In this notebook I have a GF 9600M and after os install movies were really laggy by hdmi (some wave effect on screen).
I set Acceleration->Render method to 'Advances shadres' and problem is gone. Maybe it will be useful for someone 