Hello,
The black screen on startup issue is going on for me also on Kodi 17. Sometimes it works fine and sometimes first a popup telling that Kodi crashed appears, then black screen. If I plug in a keyboard and press first CTRL+ESC and then ALT+TAB usually the regular Kodi home screen appears (sometimes I have to do it twice).
Here the log from the last startup: http://pastebin.com/HJSm2qvu
Tell me if I can provide more details, this is starting getting very annoying.