you wrote ef update.img but the right command is: uf update.img that's why. EF erases, UF uploads. topic's end and SOLVED. e97 i've found that debian stops at the 8th version about it (premade images). the main problem was that /lib/modules is empty and even if i found a solution to get debian buster in it, the libmali-midgard0 driver still shout repeatedly some error about rk3x-i2c in dmesg :'( i hope arch will do better if the armbian image don't. i'll start a new thread and register, if any find it useful.