Serial problems with Ubuntu?

One of my main problems while connecting to a serial device was a software called ModemManager which automatically opened a connection to my devices on plug-in. The solution was to disable or remove ModemManager since I never used one of these old dialup modems with my PCs anyways. Remove ModemManager: apt-get purge modemmanager or simply stop it: systemctl stop ModemManager

July 15, 2018 ยท 1 min ยท Anton Bracke