Hi,
* Thomas Schmitt <[email protected]> [260527 11:45]:
writing grml-full-2026.04-amd64.iso via dd to USB stick
$ fdisk -l grml-full-2026.04-amd64.iso
...
Disklabel type: dos
...
boots fine into linux with UEFI mode
There is no partition table entry in the MBR.
So booting must quite surely have taken its way via El Torito, because
there is no other hint about the position of the EFI partition's
position and size.
our (grml) xorriso command line is (stripped for build paths and
taken from a daily build):
xorriso -as mkisofs \
-V 'grml-full-amd64 d20260527b718' \
-publisher 'grml-live | grml.org' \
-l \
-r \
-J \
-b boot/grub/i386-pc/eltorito.img \
-no-emul-boot \
-boot-load-size 4 \
-boot-info-table \
--grub2-boot-info \
--grub2-mbr
<output_dir>/grml_chroot/usr/lib/grub/i386-pc/boot_hybrid.img \
-eltorito-alt-boot \
-e boot/efi.img \
-no-emul-boot \
-isohybrid-gpt-basdat \
-o <output_dir>/grml_isos/grml-full-daily20260527build718testing-amd64.iso
Maybe this is suboptimal. Any feedback appreciated!
Best,
Chris
