Previously I was using Ubuntu Gnome, I've needed to clean boot my systems so I've gone with straight Ubuntu 16.04.
On the two systems I've reloaded I'm getting a constant volume OSD (it appears approx every 2-4 minutes).
The only thing my two systems have in common is they both share a Logitech G710+ keyboard which does have a volume rocker.
The volume rocker does work.
How can I diagnose what's causing this issue and ideally fix it. I don't want to disable the OSD as it is useful when I do actually change the volume.