Solution: "MCU connection error" since at least April 30th due to Debian 11 update

General Discussion
1

Basic Information:

Printer Model:
MCU / Printerboard:
klippy.log

No issue, maybe info.

https://www.reddit.com/r/klippers/comments/133yl5m/debian_11_new_update

2

sed -i ‘/^SUBSYSTEMS==“pci”… results in: sed: -e expression #1, char 1: unknown command: `▒’
And yes I gave the command as root

3

See Debian Bullseye Bug causing Klipper to no longer find the printer board - #8