[mk01]

what new image ? there is no new image since July-18 because Jessie is currently broken around systemd / upstart / libpam-systemd dependency. until this is back and fixed new image won't be generated.

btrfs send | receive won't be fixed until IMAGE (partition on it) is recreated. I posted this to relevant issue on git. have you not read it?

also that's why I asked you to do following:
1) new subvolume
2) copy root/@ into it (no snapshot, no copy with using references!)
3) reboot into new subvolume
4) check if btrfs send works from such new subvolume

simply DEBIAN kernel currently on Jessie has this broken in BTRFS kernel code. I upgraded kernel on BUILD machine but again because broken uptream repo new IMAGE won't be regenratered and xbian-copy can't be tested (if new Debian kernel is patched)

this has nothing to with the actual user installation. but MAYBE it can be corrected after image deployement with the steps I sent.

HDMI audio can't work at all for you because you don't have HDMI screen.

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but in general you wanted to say that:

new dtb flles are working, cma assumption was correct and both devices boot now ?