I had this problem too, thank the user B1oHazard I solved it. The problem is the NAND frequency in the .dtb... some x96 mini have a different nand. To fix it, you need to change the .dtb file:
You need to unpack your dtb file into dts via device-tree-compile tool. Install it in linux ubuntu using
sudo apt-get install device-tree-compiler
decompile the dtb file:
dtc -I dtb -O dts -o meson-gxl-s905w-p281.dts meson-gxl-s905w-p281.dtb
edit this file searching for "mmc@74000" block
max-frequency = <0x5f5e100>;
5f5e100 in hex = 100000000 in dec
edit it to 0x2faf080, 50000000 in dec
compile with
dtc -I dts -O dtb -o meson-gxl-s905w-p281.dtb meson-gxl-s905w-p281.dts
for Armbian_20.10_Arm-64_focal_current_5.9.0.img I prepared the file for you (see attachment)
meson-gxl-s905w-p281.dtb
