# JCZFiber found only when running sudo **URL:** \ **Category:** OS Specific\ **Tags:** linux, galvo, xubuntu-23-04\ **Created:** [May 22, 2023, 8:00am UTC](https://forum.lightburnsoftware.com/t/jczfiber-found-only-when-running-sudo/100815 "2023-05-22T08:00:23Z")\ **Posts on this page:** 1\ **Showing post:** 16
**Author:** ![berainlb](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/b/85f322/32.png) [@berainlb](https://forum.lightburnsoftware.com/u/berainlb)\ **Post date:** [May 26, 2023, 4:40pm UTC](https://forum.lightburnsoftware.com/t/jczfiber-found-only-when-running-sudo/100815/16 "2023-05-26T16:40:04Z")
It didn’t occur to me that this laser may not connect through a serial connection. In that case it wouldn’t be associated to a TTY device. Review this post and attempt to apply the fix listed: > [@Fiber laser installation on Linux](https://forum.lightburnsoftware.com/t/fiber-laser-installation-on-linux/70191/6): > > Ok, I should have a solution for you: Run sudo gedit /etc/udev/rules.d/usb.rules (you can also use nano, vi, whatever) Enter the following contents SUBSYSTEM=="usb", MODE="0666" Save the file and close. Then run: udevadm control --reload-rules Now plug your galvo USB connection back into the machine. Run LightBurn without sudo and you should be able to automatically find and connect to the device. --- _[View the full topic](https://forum.lightburnsoftware.com/t/jczfiber-found-only-when-running-sudo/100815)._