Permission on serial port on Ubuntu laptop

[Bob_van_der_Putten]

What is the problem?

I installed Octoprint on a Ubuntu laptop. Connected a Ender-3 printer via USB to the laptop. I got /dev/ttyACM0. When I try to connect, it says permission denied.

What did you already try to solve it?

I tried several options already. like

• sudo chmod 666 /dev/ttyACM0, (kept Octoprint running) => no success
• sudo nano /etc/udev/rules.d/99-ender3.rules and added KERNEL=="ttyACM[0-9]*",MODE="0666" to the file. Logged out and logged in. => no success.

[jcassel]

Well, would be better if you provided the template details but I have a hunch that your issue is the same as this one:

Just set up Octoprint on Linux laptop, unable to connect to printer

What is the problem? I am setting up octoprint for the first time on an old Linux laptop. I completed the setup process and got my webcam working but octoprint is unable to connect to my Ender 3. When I attempt to connect I get the error: "No more candidates to test, and no working port/baudrate combination detected." In the serial port dropdown I have AUTO as well as /dev/ttyS0 through /dev/ttyS31. I have tried each port individually with no success. I see the following from dmesg right afte…

If that is of no help, see if you can give us the systeminfo bundle in your next post. It should give us a bit more specific on the error you are getting.

[Bob_van_der_Putten]

Hi jcassel,
I receive the permission denied message, not the disconnect message in the post you mentioned.
I run 1.4.0, no system-info bundle available. I installed octoprint from the Ubuntu software store. Do I need to install octoprint in a different way?

[Ewald_Ikemann]

By what procedure have you installed OctoPrint onto Ubuntu?

[Bob_van_der_Putten]

By the ubuntu App center

.

[Ewald_Ikemann]

That is quite old

I recommend: GitHub - paukstelis/octoprint_deploy: Bash script for rapid deployment of multiple octoprint instance on a single machine

[Bob_van_der_Putten]

Thanks Ewald, that worked for me!