For Fedora 36 this magical nonsense works to boot the iso image
file stashed on a usb stick:
set data_usb_uuid="7ad8f114-5b24-47bb-86c6-0b229519d76c"
function set_data_usb_root {
insmod ext2
insmod gzio
insmod part_gpt
insmod part_msdos
load_env bootvid
set root='hd0,msdos2'
search --no-floppy --fs-uuid --set=root ${data_usb_uuid}
}
menuentry 'Fedora Workstation Live 64-bit 36 (1.5)' {
set_data_usb_root
set isofile="/images/Fedora-Workstation-Live-x86_64-36-1.5.iso"
loopback loop "$isofile"
linux (loop)/isolinux/vmlinuz ${bootvid}
root=live:CDLABEL=Fedora-WS-Live-36-1-5 iso-scan/filename="$isofile"
rd.live.image
initrd (loop)/isolinux/initrd.img
}
If I try the same thing with the Fedora 37 iso image file (looking up
the CDLABEL to use via the isoinfo tool), it doesn't work. I guess
the entire internal structure of the iso image is now different?
(Something to do with getting rid of syslinux maybe?)
Anyone know the proper incantation to boot the iso image directly
via grub2?
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