Image created with --make-pxe-live boots in BIOS but not UEFI/IPXE

[zerocarbthirty]

Hello,

I was able to get an image built that boots via PXELINUX in BIOS mode but I am unable to figure out how to get iPXE/UEFI to boot it.

This is what I am attempting:

:toast
kernel toast/vmlinuz-5.14.0-503.15.1.el9_5.x86_64
initrd toast/initramfs-5.14.0-503.15.1.el9_5.x86_64.img root=live:http://10.0.1.0/uefi/toast/live-rootfs.squashfs.img
boot

The system loads the kernel, the initrd, and then boots.

It then kernel panics unable to mount rootfs.

I tested this with the standard AlmaLinux 9.5 kernel/initrd from the installer and it boots in both BIOS and UEFI with the same files.

Has anyone gotten an image built to boot in both BIOS/UEFI?

[zerocarbthirty]

Welp, I got it to work like this in IPXE

:toast
kernel toast/vmlinuz-5.14.0-503.15.1.el9_5.x86_64 initrd=initramfs-5.14.0-503.15.1.el9_5.x86_64.img rootflags=loop root=live:http://10.0.1.0/uefi/toast/live-rootfs.squashfs.img rootfstype=auto
initrd toast/initramfs-5.14.0-503.15.1.el9_5.x86_64.img
boot

I'm not 100% sure why this works and the other way doesn't but it may be useful to document this somewhere.