Le mardi, 2 décembre 2014, 13.02:49 Matthias Urlichs a écrit : > Dmitriy Fitisov: > > > lsof /dev/ttyACM0 > > > > That I also tried last week. Nothing is open. > > The next target of interest would be udev. > Which rules fire, and do they start anything? In particular, do you have usb-modeswitch installed and running? OdyX