Armbian kernel & Klipper host mcu: "Got error -1 in sched_setschedule"

[Sineos]

Klipper-mcu Service Fails to Start

Background The klipper-mcu process fails to start on certain Linux distributions, even when the relevant documentation is carefully followed. This issue primarily affects Armbian Linux distributions or those based on Armbian. Diagnosing the issue The easiest way to recognize this problem is in the klippy.log where an error message like mcu 'rpi': Unable to open port: [Errno 2] No such file or directory: '/tmp/klipper_host_mcu' will appear. Further issuing the command: systemctl status klip…