Unable to install Ubuntu (first boot) on Framework 13

Framework Laptop 13 Linux
1

Which Linux distro are you using?
Ubuntu 26.04

Which BIOS version are you using?
LFK30.04.02

Which Framework Laptop 13 model are you using?
AMD Ryzen™ AI 300 Series

I upgraded the BIOS to the latest version. I have flashed the Ubuntu 26.04 OS onto a USB-C flash drive. I tried both the top right and top left expansion card slots to boot Ubuntu 26.04 (and 24.04). I always keep getting the error - file /boot/ not found. Note, again, that this is a freshly assembled AMD Ryzen AI 300 Framework 13. Please help.

What all I have tried:

  1. Two different flash drives with both Ubuntu 24.04 and 26.04 (four combinations)
  2. Top right and top left expansion card slots for all four combinations
  3. Balena Etcher, Raspberry Pi Imager, and Mac terminal command sudo dd if=~/Downloads/ubuntu-24.04.4-desktop-amd64.iso of=/dev/rdisk2 bs=1m status=progress for all 4 combinations from #1
  4. I have checked shasums for both the OS ISO files

I’m just stuck in the same spinner screen as the user from this post: Struggling to boot Ubuntu

2

Also, disabling secure boot might help for install.

3

I need further information in the boot screen to see what’s happening during boot.

When you are in the boot splash (spinner), can you press ESC and take a picture of the text console?