First boot after mainboard replacement
======================================

 We couldn't detect an operating system or bootable drive.

 Scan the QR code for setup guides or press any key
 to go to the boot manager screen for additional options.

Link:

- https://fr.mw/FRANNBOOHG
- https://knowledgebase.frame.work/en_us/no-boot-device-found-amd-ryzen-ai-300-series-BJvitzIhyx

BIOS showed the NVMe SSD.

Pressing F3 during boot opened the "Insyde File Explorer", which let me select the debian shim.efi file that booted grub.


Boot from live-usb
==================

After booting from live USB once and updating the laptop's firmware, it would not boot from usb anymore.
I had to unplug the USB-A expansion card and replug it - then it could boot from there again.


Re-installing grub
==================

Boot from the kernel with F3 by manually selecting the shim.efi, then run "update-grub2" to install the bootloader into the UEFI mainboard settings.


linux kernel boot issue
=======================

 Falsche Shim-Signatur
 (bad shim signature)

- 6.16 did not boot, brought shim error
- 6.12.xx did boot

Reason: I had manually installed 6.16 to get Debian running on the laptop, see https://community.frame.work/t/tracking-debian-testing-on-the-framework-laptop/14448/34
This kernel had no signature.

This time I wanted to keep secure boot enabled.
6.16 is old, to instead of signing it with my own secure boot key (see https://wiki.debian.org/SecureBoot) I decided to install a newer official kernel.


Manually install Debian backports kernel
========================================

https://www.simplified.guide/debian/kernel-install-backports

:: 

  $ apt install -t trixie-backports linux-image-amd64 linux-headers-amd64