The --syslinux flag does not seem to work with Grml 2026.04.
root@nitschke:/home/john/src/grml4speakup# grml2usb --syslinux
--bootoptions="ssh=mysecret" grml-full-2026.04-amd64.iso /dev/sda1
Executing grml2usb version 0.20.13
Using syslinux as bootloader
Checking for boot flag
Using ISO grml-full-2026.04-amd64.iso
Identified grml flavour "grml-full-amd64".
Copying files. This might take a while....
ISO does not contain syslinux files (logo.16 not found). Falling back to
GRUB for BIOS boot.
No /boot/grub/grub.cfg found inside EFI image, looks like Secure Boot
support is missing.
Skipping syslinux installation, ISO does not support it
Synching data (this might take a while)
