Framework Laptop DIY: booting problem after installation of Linux Xubuntu 21.10

[Korvin]

@Yvo_Brasseur

the system does not boot anymore.

What does it mean in practice? Does it show something?

FYI:

Laptop reboots itself to No Boot Device Screen

Yep, this is a known issue on one of the older SN850 firmware versions. We have a KB article on it here: My system is rebooting to a “Default Boot Device Missing or Boot Failed” message