So far I got that the USB boot mode is rather misterious...
Yes, there's a tool named elftosb in buildroot, but it is not in the menu tree, I'm investigating how to include.
Anyway what it is not clear at all is: WHAT will execute a file uploaded with imx_usb and, more important, in which state the system is ?
I suspect that closing the USB boot while the kindle is running normal the system shoud be available, but I'm waiting for more informations before re-open the kindle, it is a tedious work...
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