I’ve just installed it, the device is connected as can be seen from the highlighted line in the terminal in the screenshot, but nothing shows up. I’ve added myself to dialout and tty, as per these instructions but it just doesn’t work.
What am I missing?
Did you relogin after modifying the group membership?
I did, yes. I’m currently experimenting with a virtual machine, but that’s proving, interesting. Kind of unknown territory there, I’ve never done this before. Seems painfully slow, but I guess that’s to be expected.
2 things:
- confirm that a serial device has been created for the laser
ls /dev/*USB*
- If a device has been created then try creating the device profile manually in LightBurn
What virtualization framework are you using?
ls /dev/USB
ls: cannot access ‘/dev/USB’: No such file or directory
ls /dev/usb
hiddev0 hiddev1 lp2
To confirm, you used the asterisks when you ran the command, yes?
If so, then the serial device is not being generated or is not staying generated.
What distro are you on?
Can you plugin the laser and then capture all the dmesg output generated from that point and post here?
I tried it with and without the asterisks. I’m using Mint 21.1.
As for dmesg, this is what happens when I unplug it and plug it in again:
[ 1429.726028] usb 1-3: USB disconnect, device number 8
[ 1446.789505] usb 1-3: new full-speed USB device number 9 using xhci_hcd
[ 1447.038898] usb 1-3: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice=81.34
[ 1447.038908] usb 1-3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 1447.038911] usb 1-3: Product: USB Serial
[ 1447.060745] ch341 1-3:1.0: ch341-uart converter detected
[ 1447.074701] usb 1-3: ch341-uart converter now attached to ttyUSB0
[ 1447.631428] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input27
[ 1447.639509] usb 1-3: usbfs: interface 0 claimed by ch341 while ‘brltty’ sets config #1
[ 1447.646804] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
[ 1447.646836] ch341 1-3:1.0: device disconnected
Appears to be the braille module …
I think I had to remove it… I still have one good eye 
Yeah, lasers will do that if you’re not careful.
Anyway, sudo apt remove brltty, reboot (just to be sure) and here’s dmesg now:
[ 56.309408] usb 1-3: new full-speed USB device number 7 using xhci_hcd
[ 56.559424] usb 1-3: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice=81.34
[ 56.559433] usb 1-3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 56.559436] usb 1-3: Product: USB Serial
[ 56.605906] usbcore: registered new interface driver usbserial_generic
[ 56.605912] usbserial: USB Serial support registered for generic
[ 56.606758] usbcore: registered new interface driver ch341
[ 56.606765] usbserial: USB Serial support registered for ch341-uart
[ 56.606775] ch341 1-3:1.0: ch341-uart converter detected
[ 56.620003] usb 1-3: ch341-uart converter now attached to ttyUSB0
That last line is encouraging, so I fired up LightBurn and ooh, look at that.
And I can move the laser x and y directions using the arrow buttons, so I guess it’s communicating. Things are looking up. Thanks for the push in the right direction.
Great you are up again… I’d forgotten about the braille business until I saw it in your output…
If this solves the issue, mark the thread solved…? Thanks for adding what you did…
Others will come along and it helps them…
You can drag and drop or use the upload icon
in the tool bar to post photos and .lbrn2 project files. It won’t accept a pdf and some other file formats, so we append the .txt extension and you can then drop it on the reply window.
Good luck
Yes, I removed brltty as per the link you posted.
How do I mark it solved? Just edit the title or is there a tag somewhere I set?
Note that auto-detection to GRBL-M3 is likely a false positive. I’d suggest modifying the device type after the fact to GRBL. Or create manually.
You can modify by pushing “Devices” button in Laser window, selecting your laser, then Edit.
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Please mark as Solved, I just read the whole thread in order to help and found out it was already solved. Should be an option on the page since you’re the OP, just search the page for “solve” and you should find it. You can also edit the title and add " - SOLVED" to the end of the title.
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Well thanks for reading it. I did mark Jack’s reply as a solution, and this appears to have been tagged onto my original post. But I’ll edit the title too.
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