cp210x converter now disconnected from ttyUSB0 by 'brltty', on Ubuntu MATE 22.04 LTS.
Recently, I install CircuitPython on ESP32-S3-DevKitC-1 on Ubuntu MATE 22.04 LTS/VirtualBox . But the CP2102N USB to UART Bridge Controller always attached and disconnected, like this: It's found that the interface 0 claimed by cp210x while 'brltty' sets config. BRLTTY is a background process (daemon) which provides access to the Linux/Unix console (when in text mode) for a blind person using a refreshable braille display. It drives the braille display, and provides complete screen review functionality. Some speech capability has also been incorporated. In my own case , I think brltty is not needed, so I remove it with command: sudo apt remove brltty It work for me, ttyUSB0 can be connected normally after brltty removed.