I finally got my Pi 3 and did a quick test and its not gone well.
I have a couple of SD cards built with Libreelec (one is a back from a while back) which both work work fine on the Pi2... .But when I insert them on the Pi3, I just get the "Rainbow" splash screen.
I know the Pi3 is good as I have used other OSs on it, so there is something about my LibreElec installation which it doesn't like
I could start from scratch, but I have added so many things, I am not sure I will remember how to rebuild it..
Anyone got any ideas on what could cause this.. Interestingly, I have read a ton of posts about adding a "delay" in the "config.txt" file, or changing the Kernel, but for me, the FAT partition of the SD card does not have these files.
Fingers crossed someone can help
Jon
Edit: I have just created a completely new SD card for LibreElec and the file system looks completely different... The SD card is labelled "LIBREELEC" and I have Kernel and Sytstem files in root.. My other SD cards are labelled "RECOVERY" and the file system looks different.
One thing I notice on my old card is that some of the folders I mention "OpenElec" which is the OS I used to use before "upgrading" to LibreElec.. So I fear the cards are build completely differently.
I am going to have a little play to see if I can copy the files from the 'new' card onto the old one, to try and create something that works.. Of course, i will be taking backups so I have a way back.. Wish me luck!