I'm using qemu with KVM acceleration to boot an ubuntu 22.04 instance.
The disk is a lvm that is flat. Not partitioning, just an ext4
filesystem. I've build a grub image to be used with the -kernel option
of qemu. I've also built and am using custom version of seabios with
virtio support.
I'm building the grub kernel using the following command
/opt/grub2-i386/bin/grub-mkimage -O i386-pc -o grub.img normal biosdisk
ext2 -p '(hd0)/boot/grub'
The idea here is that the grub kernel will load grub, it's config, and
any required modules from the instances disk. I have successfully been
able to do this with AlmaLinux/RHEL 9 but for some reason I cannot get
it to work with Ubuntu 22.04 LTS. Grub loads, I see the options as
expected but when I select an option I immediately get the following
error and I can't seam to figure out why. It's driving me crazy.
!
452: out of range pointer: 0xbfec8630
Any idea's what's going on here? Or how to figure out whats going on?
Remember the disk is flat, no partitioning and no MBR.
On a side note, if I pull the vmlinuz and initrd from the disk image and
use them with the -kernel and -initrd qemu params I am able to boot the
instance.
--
Shaun Reitan
