Stuck in boot loop after update

General Discussion
1

Basic Information:

Printer Model: Ender 3 V2
MCU / Printerboard: Creality 4.2.2
klippy.log Can’t get this - see below

Fill out above information and in all cases attach your klippy.log file. Pasting your printer.cfg is not needed
Be sure to check our Knowledge Base and in particular this and this post

Describe your issue:

I just switched from a Pi 3B+ to a 4B 2GB. Klipper booted perfectly and Mainsail loaded perfectly (after changing my bookmark to the new Pi’s IP). I saw there was updates because I hadn’t run it in a month or so so I hit update. Now it’s stuck in a boot loop. The last line I see on the screen is “Klipper Login:” then it goes to a black screen with a cursor top left then back and forth. Mainsail won’t connect, can’t SSH in via IP (thus no klippy.log).

Any ideas? TIA

2

I have this same issue on a Voron 2.4 after updating all my packages- was there any fix?

So after some troubleshooting the Sonar application was restarting my WiFi connection in a loop. I ran sudo systemctl stop sonar and have access to the Pi again.

3

There was a fix but I don’t remember what it was lol. Sorry!