Hi, there I just flash the package ArchLinuxARM-rpi-2-latest.tar.gz to my raspberry pi 3b+, and I try to control my device via serial port But after I try to fix config.txt with code: gpu_mem=64 initramfs initramfs-linux.img followkernel dtoverlay=miniuart-bt core_freq=250 core_freq_mini=250 enable_...