I’ve a 3D printer related to a USB digital serial port (/dev/ttyACM0).
I’ve discovered that after I begin the Ultimaker Cura Appimage  and likewise after I did a “snap set up”, on Ubuntu 19.10, my serial port is reset (at the very least, the printer acts that means and stops the present print).
Why is that this taking place? Does snap/appimage probe the serial ports or reset one thing low-level?
I used to be considering to restrict the usage of the serial port utilizing AppArmor (by no means used it) or, if I’ve to, create a particular account to restrict the entry to it.
Observe: I at the moment have Udev setup to permit my person to entry the serial port.
 https://software program.ultimaker.com/cura/Ultimaker_Cura-4.5.0.AppImage?obtain=httpspercent3Apercent2Fpercent2Fsoftware.ultimaker.compercent2Fcurapercent2FUltimaker_Cura-4.5.0.AppImage