Edk2 doesn't recognize eMMC

Support
1

After flashing my Lenovo Idea Flex 5i with mrchromebox full-Rom, the edk2 payload fails to recognize the eMMC Storage where the OS is supposed to go.
It neither shows up in Linux (lspci, lsblk) nor in the UEFIs cbmem anywhere.
I’ve tried dual-booting with RW-Legacy which works until the install is finished. The Mint installer detects the partition i’ve made with CRAP and installs Linux perfectly but after installing the eMMC is gone from edk2 again.

I’ve tried several solutions from the forum but none seemed to work.
Is this a known issue or just something odd about my Chromebook?

2

logs – don’t tell us there is nothing there, post them (cbmem especially).

Also, ChromeOS board name.

3

It’s an AlderLake (TAEKO) board
Cbmem —console
Cbmem
Thanks for the reply

4

I think we’re going to need to see the output from edk2, so need to use a debug build

5

cbmem following the firmware debug from your site

Debugging.sh output

If a full debug build is necessary, is there a tutorial on your site?