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cura fights with octoprint for /dev/ttyACM0?

Claghorn

By Claghorn
in UltiMaker Cura

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Claghorn

Claghorn 1

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Posted · cura fights with octoprint for /dev/ttyACM0?

I have an x86_64 system where I have installed octoprint. A printer with a smoothieboard is on a USB connection at /dev/ttyACM0. Octoprint works perfectly by itself. I have also downloaded the cura appimage (1.12.1) and with octoprint stopped and octoprint plugin removed, it also works perfectly by itself. If I install the octoprint plugin in cura, I can connect to octoprint, but apparently cura and octoprint are still fighting over control of /dev/ttyACM0. I can try to move the print head via manual control and nothing will happen for several seconds, then it (sometimes) suddenly moves. Octoprint gives errors about communication problems with the usb device.

 

Is there some hidden setting I can use in cura to make it never try to talk to /dev/ttyACM0? It shouldn't need to if it is talking to octoprint.

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