Software Not Finding My Laser

Yesterday, a friend posted a question here on my behalf asking for help with my trial expiring immediately upon install. He was able to get that resolved, but I am now attempting to connect my laser (Creality 5w) to my computer (HP Chromebook with Linux enabled), and the Lightburn software cannot seem to find my laser. I’ve attempted to have it find the laser with it connected via USB, by using the USB thumbdrive that came with the laser, and a number of different attempts to set it up manually. However, my computer skills rate no better than a 4/10, so this could be a ME issue.

Others seem to have been able to run Lightburn using Linux on a Chromebook, so I am hoping that is not the problem here. Can someone provide guidance?

Thanks!

Did you follow the instructions for installing on Linux?

Installation & Setup - LightBurn Software Documentation

Thanks, but I think this is where my ignorance becomes obvious.

Linux is installed correctly (computer engineer friend handled that yesterday). I am added as a user, but tty does not exist. The balance of the instructions take me no where, so I think the “tty” issue may be my holdup?

First make sure that you’ve taken care of the group permissions.

sudo adduser $USER dialout && sudo adduser $USER tty

After that, confirm that a serial device is being created for the laser.

Can you run this command in a Terminal:

ls -l /dev/*USB*

If no device is listed there then do this:

  1. shut off the laser
  2. run sudo dmesg
  3. turn on the laser with it plugged into USB
  4. run sudo dmesg
  5. capture the new output between steps 2 and 4 and paste into a reply here

ls: cannot access ‘/dev/usb’: No such file or directory
mk9750@penguin:~$ sudo dmesg
[ 0.000000] Linux version 6.1.55-06876-gecce3ad0352d (chrome-bot@chromeos-release-builder-us-central1-b-x32-23-y0bg) (Chromium OS 17.0_pre498229-r6 clang version 17.0.0 (/mnt/host/source/src/third_party/llvm-project 14f0776550b5a49e1c42f49a00213f7f3fa047bf), LLD 17.0.0) #1 SMP PREEMPT_DYNAMIC Sat Nov 11 18:44:44 PST 2023
[ 0.000000] Command line: panic=-1 console=hvc0 earlycon=uart8250,io,0x3f8 printk.devkmsg=on root=/dev/pmem0 ro

You’ve been so kind in helping, but while waiting for your next reply, I’m not quite sure what I did, but I think all is reloved now. I am now able to work with files, and am editing a picture I imported. Thanks so much for your kind help!

That’s great. Had you run the command providing group permissions? If so, that may have resolved the issue.

If the tty command was for group permissions, I attempted that, but I thought the response was user not found.

Guess I was wrong. Went through an initial project set up in Lightburn, and when I attempted to selct “frame” to see where the project would run on my piece, I get a dialog box saying “the laser does not appear to be connected to your computer” When I click on the device list, I see “GRBL CR-Laser Falcon” I think in the 6 hours I worked on this issue last night, I may have tried to selct that from a drop own list of possible devices.

What I don’t understand is that today, I was struggling to connect my laser to my computer, and Lightburn would not allow me to move forward. I ran some of the commands you reccomended, and was able to move forward, but with a device I had selected in error yesterday.

I want desperately to have this figured out by Friday when my grandson will be here. We do a project each year where he makes Christmas presents for everyone, and this is what he wants to do. I’ve got a good week, off and on, trying to get this ready to go, and it’s getting quite frustrating. I know 'm to blame, but my inadaquacies are getting the better of me.

Let’s take this one step at a time.

  1. Run this in Terminal. Please do so by copy and pasting from the Forum to the terminal:
    sudo adduser $USER dialout && sudo adduser $USER tty
    Please return output showing the command the results
  2. Run this in Terminal by copy and pasting. Please return output:
    ls -l /dev/*USB*
  3. Take a full screenshot of LightBurn. Please make sure Laser window is in view when you do this.

[138770.902443] maitred: Received request to update VM resolv.conf
mk9750@penguin:~$ sudo adduser $USER dialout && sudo adduser $USER tty
The user mk9750' is already a member of dialout’.
The user mk9750' is already a member of tty’.
mk9750@penguin:~$

mk9750@penguin:~$ls -l /dev/USB
-bash: [138770.902443]: command not found
-bash: mk9750@penguin:~$: command not found
-bash: command substitution: line 1: unexpected EOF while looking for matching '' -bash: command substitution: line 2: syntax error: unexpected end of file -bash: command substitution: line 1: unexpected EOF while looking for matching ‘’
-bash: command substitution: line 5: syntax error: unexpected end of file
-bash: The: command not found
-bash: command substitution: line 1: unexpected EOF while looking for matching '' -bash: command substitution: line 2: syntax error: unexpected end of file -bash: command substitution: line 1: unexpected EOF while looking for matching ‘’
-bash: command substitution: line 3: syntax error: unexpected end of file
-bash: The: command not found
-bash: mk9750@penguin:~: command not found
mk9750@penguin:~$

Something didn’t work correctly with this and it’s not obvious why. Can you try adding one component of the command at a time to see where it breaks down? I’ll drop the -l this time.

ls
ls /dev
ls /dev/*USB*

Can you take an updated screenshot with the following adjustments:

  1. Have the Console window in view
  2. Push the button that currently says “(Choose)”

mk9750@penguin:~$ ls
‘CR-Laser Falcon.lbdev’ “Joe’s Christmas Gift 2023.pdf” ‘New Folder2’
install.exe ‘New Folder’ ‘New Folder3’
mk9750@penguin:~$ ls /dev
console dri full initctl log mqueue null pts shm stderr stdout urandom zero
core fd fuse kvm lxd net ptmx random snd stdin tty wl0
mk9750@penguin:~$ ls /dev/usb
ls: cannot access ‘/dev/usb’: No such file or directory
mk9750@penguin:~$

You did not use capital USB. Can you try that again please?

Also, can you take an updated screenshot of LightBurn with Console window showing as well as with “(Choose)” button pressed?

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