[matf]

Thanks to the guide here I've successfully set up my HP Chromebox as dual-boot - and generally it's working perfectly! Using with PlexBMC, and Live TV streamed from a DVBLink server. I have encountered some issues:

1. Overscan settings not saved - there's a significant amount of overscan. I used the Video Calibration in Kodi to fix, but it appeared it wasn't saving after a reboot. SOLUTION: In the end, I went in via SSH and directly amended the guisettings.xml for every resolution combination shown and so far that seems to be working.
2. Crushed blacks - MAYBE SOLUTION: set the limit in Video settings: Settings -> System -> Video output -> Use limited color range (16-235). It's better, though I still think blacks look really, really black...I've read elsewhere in this thread that turning off VAAPI might help, so I'll try that but not sure if there are other consequences.
3. Suspend/Wake - Suspend works great, but when I wake it always reboots back to the Developer screen. Using Flirc and tried a variety of remotes. Lots of people here say suspend is working perfectly, so if anyone can help I'd be grateful!

Thanks Matt though - stunning piece of work.