K-Type enters flashing mode when using Ultimaker Cura about controller

[gabfv]

I've created an issue with Cura as well, since I did not know whether the issue resides in my keyboard or in Cura.

[haata]

Yeah, the K-Type has a bunch of USB endpoints. Most likely an unexpected USB request is being sent over one of the reserved endpoints which is crashing the keyboard. In some cases the K-Type will reset to flash mode when the firmware crashes. I believe later firmware generally resolves this, but possibly not for all situations.
If you can find out which endpoints are being used by Cura, then I can give more insight and possibly suggest a solution.

[gabfv]

Seems like it just probes all serial ports automatically. I've disabled the plugin so this fix the issue I've encountered.

[Ghostkeeper]

Cura has an open feature request regarding this: Ultimaker/Cura#3449

The bug lies in Cura as far as I'm concerned. Cura will probe all serial ports using a command "M105". If the device responds with a valid temperature response like Marlin does, then it'll add a USB printing output device and allow printing via USB. That's not really nice behaviour from Cura.

[gabfv]

Thanks, I'll close this issue since it lies in Cura.