(In reply to John from comment #0)
> Since moving to 4.0-rc1 when my screen goes off (energy saving), I lose the
> hdmi audio, standard stuff. 
> When I move the mouse I get the screen back but not the audio anymore.
> Switching it back on with xrandr works.
> 
> Thanks

Can you please attach the 'right' xrandr line, please?
I do not hear anything after screen goes off (energy saving) with
drm-next-4.1-wip on r600/NI/Turks, too.

So it seems to be not only with radeonsi.

-Dieter