I am having issues with connecting to Lightburn 1.7.08 in Manjaro Linux running kernel 6.12.20-2.
The green highlighted “USB Serial” device goes away when I unplug the laser as does the ttyUSB0 port in Lightburn. So it looks like it’s being polled by the software and the correct port is selected. When I reselect in Lightburn I get “Port failed to open - already in use?” error. I’m just not sure where the disconnect might be.
We’d recommend you use the supported distro, Ubuntu, and see if that resolves your issue. If you’re using a USB hub or adapter, that may also be an issue - try an alternative or remove them from the connection path if at all possible.
Installed Ubuntu 22.04.5 LTS
Used lsusb to check the controller displayed as QinHeng Electronics CH-340 usb-serial adapter
Uninstalled brltty
I opened this file: /usr/lib/udev/rules.d/70-uaccess.rules
and added this line:
SUBSYSTEM==“tty”, ATTRS{idVendor}==“1a86”, ATTRS{idProduct}==“7523”, GROUP=“users”, MODE=“0666”
Essentially I followed the directions I found in this wiki:
The same issue still appears under Ubuntu.
Did you add your user to the dialout group?
That fixed it, thanks.
Used the command listed below for reference:
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This is for reference for anyone using Manjaro. It looks like I got it working by substituting the Manjaro commands for the ones specific to Ubuntu listed above to add users:
adduser:
gpasswd -a
rather than the dialup group use uucp.
The final command to add the user to the usergroups is below:
sudo gpasswd -a $USER uucp && sudo gpasswd -a $USER tty
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