Hi, I have M8S+ ( it's run normaly android 5.1).
I have tested many images and many dtd. Nothing works.
Only one image works it is LibreELEC-M8S-Plus.arm-9.2.8.6.img.gz from http://libreelec.dtech.hu/images/S8X2/
I change the uEnv the name of dtb.
Last teste /Armbian_20.09_Aml-s812_bionic_current_5.9.0-rc7.img. from https://disk.yandex.ru/d/-MwoNitZonsRCg/Armbian/20.09/20201002
I do not know what else to do.