So, I got this to boot from USB on an HK1 RBOX with a rk3528. It was a very cheap android TV box, I believe it was like $20 shipped. I compiled my own Ubuntu kernel and went through a bunch of manual entries and probing parameters and I'm convinced that if I can get the time to work on it, I can make this work on this particular box from an sdcard without the end user doing anything except flashing a .img to it *hopefully*, keeping the original system completely intact. Hopefully I'll get time, but if someone else has this box then I'm posting to say that it's 100% possible to run Linux, but I can't say if everything is 100% working or not yet. Bootscripts seem to be giving me trouble, so right now I'm doing everything manually every step of the way until I can look into it. Some of the hints I used came from jpegqs, and the rest was just poking around for correct parameters. I kept the factory installed uboot on the device, which has an interrupt mode, and from there you can go through and check a lot of things. I'll post back here if I ever get around to making a simple sdcard image
