There is a method online about how to bypass the bootloader and gain the root.
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After rooted, I tried with different versions of Libreelec, but all failed at boot.
Mi box 4 has a S905L chip with 2GM RAM and 8 GM RAM, so I tried meson-gxl-s905x-p212.dtb. However it does not work.
I dig into directory of the box and I found a dtb file in the folder of mi box. But it does not work either. (I attach it here not sure if it useful or not, I have to change the extension to txt to attach the file...)
Any suggestion about how can I make Libreelec work on Mi box ? Thanks in advance.