I had the problem on APU4C4, iirc. You install openwrt on it, everything is working fine, then, you reboot and you get nothing on the serial port. You unplug/p

I had the problem on APU4C4, iirc. You install openwrt on it, everything is working fine, then, you reboot and you get nothing on the serial port. You unplug/plug it, cold boot it, and then it works again.