qdl: fails on Linux with "exit status 1

[dido18]

Motivation

On Ubuntu 20.04, the qdl command executed by the flasher CLI exits with a generic exit 1 without feedback.

Why ?

The qcserial is locking the resource

Steps to check the issue:

• check if the qcserial is present

❯ lsmod | grep qcse
qcserial               24576  0
usb_wwan               24576  1 qcserial
usbserial              69632  2 qcserial,usb_wwan

• check if the qcserial is looking the ttyUSB0

 sudo dmesg

[31633.372270] qcserial ttyUSB0: Qualcomm USB modem converter now disconnected from ttyUSB0
[31633.372308] qcserial 3-3:1.0: device disconnected

How to fix

You need to disable (blacklist) the qcserial kernel module on a Linux system.

Steps to disable the qcserial module:

1. Open a terminal: on your Linux system.
2. Create or edit a configuration file: in the /etc/modprobe.d/ directory. You will need administrative privileges for this.
   For example, create a new file named blacklist-modem.conf using a text editor like nano or vi:

        sudo nano /etc/modprobe.d/blacklist-modem.conf

3. Add the blacklist directive: for the module:
   Inside the file, add the following line:

        blacklist qcserial

4. Save the file: and exit the text editor.
5. Restart your system: for the new configuration to take effect.

Additional context

Related

• [PXCT-1499] Add instructions for fixing qcserial issue on linux (arduino-flasher-cli) docs-content#2668