The subject pretty much sums it up: I added myself to the dialout group (which is the owner of /dev/ttyACM0), but I still cannot upload. I have used fuser, and it appears that no processes are using the port. In the programming port mode, I get “Error: No Valid JTAG Interface Configured.” In the native port mode, I get “openPort(); Exception type - Port busy.” I am using the latest version of the Arduino IDE and I have tested two NEW Arduino boards. Neither work.
The only way I can upload is in root. Interestingly, I CAN upload to an Arduino Uno in my normal user, leading me to believe that this is a bug. Furthermore, if I upload a serial echo sketch as root, I can use the serial monitor to talk to the Arduino in my normal user. One interesting line in syslog is “ModemManager: Couldn’t create modem for device at ‘/sys/devices/pci0000:00/0000:00:1d.3/usb5/5-1’: Failed to find primary AT port.”
This happens whenever I plug the device in to the native usb port.
Currently I am running Java as root to upload sketches, so any solutions would be appreciated!