happybrahma

Also, I am more than happy to try running commands and to modify the chrx scripts to test any fixes.

Digging some more, it looks like this grub config that I am getting during legacy boot is coming from (p12)/efi/boot/grub.cfg. I don't know where this file came from, or why...

Ok, I'm kinda thinking tianocore is actually doing a UEFI boot, and I need to mount and chroot my Ubuntu partition, remove the grub pc packages, and install the eufi...

I uninstalled the grub-pc stuff and installed the grub-efi-amd64 stuff, and used the grub-install options from the mount-chrx script, and it worked! Now when I choose the alternate firmware boot...

I have an alder lake OSIRIS board chromebook. Acer 516 GE chromebook. I'd be happy to test out an alt firmware binary if anybody has built one.. I'm sure I...

Probably worth mentioning that I'm just trying to boot grub/ubuntu LTS 22.04.2

Successful installed the firmware (edk2), booted USB for ubuntu live install media, installed, and am successfully booting grub and ubuntu 22.4.2 on internal drive partition p7. Sound does not work...

Got it. Thank you for the support!