I am currently using the Armbian 20.02 release and doing some tests with the serial ports of a Pine64-LTS board. I noticed that i could not get all the serial ports to work. I needed to make a couple of changes in order to get them all working. Maybe i did something wrong and my changes were not needed, but i still would like to list them here in order to help other users who are having problems with the serial ports.   When first starting up the armbian release i u