@dbj can you boot your onyx os?
just follow hans1 instructions in post #90 on page 6 in this thread
I think you can start with mfgtools point 7. in his post
the usb serial console is very powerful: if you have a look at seaniko7's video on the 1st page at 13:27 he uses the serial console to initialise the onyx firmware update with /init command. It didn't work for me but give it a try. I found that after using /init and cancelling that command you can use the joystick on boox again to select "boot obuntu". Then Obuntu file system is mounted @ /mnt/mmc and then you can play around with it.
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