Also you could (if you haven't already) try asking in the LibreElectro forum
And also please check that your flashing the orange pi correctly. Note that the LibreElectro image is a .img.gz file and the Ubuntu one is (from what I remember) a .iso file
You could also try a older LibreElectro version and see if that works. If it does open a issue in their GitHub repo about the latest release being broken