[giant25]

Thanks. I went to the latest Beta as well and the black screen hasn't happened yet. I am running a completely fresh build with no add-ons (except pvr.wmc). However, I have other issues now:
-commercial skip isn't working with PVR.WMC
-sometimes all GUI text disappears completely and I have to reboot it change resolution to resolve.
-PVR playback would buffer regularly (kernel bug that I applied workaround to)

Anyone else see this with latest Beta on a Chromebox? 

  
it's likely an addon issue, so check the PVR subforum for WMC, or the LibreELEC forums

Agreed for pvr issues, but the text disappearing is the entire GUI regardless of skin. And it seems to be triggered when info comes up when playing a movie (pausing, etc). I'll go ask around LE forums, but it could be a GPU compatibility issue...