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fix: restore -partition_offset 16 to xorriso for USB boot compatibility

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The old Debian Live ISO used -partition_offset 16 which reserves space
for a GPT partition table in the hybrid MBR layout. UEFI firmware on
some machines requires this to recognize the USB as bootable. We
removed it thinking it was Debian Live-specific but it's actually an
xorriso hybrid boot requirement.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Dorian 2026-03-27 21:14:49 +00:00
parent 6eb6f8b27d
commit a12e97ca72
1 changed files with 2 additions and 0 deletions
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2
image-recipe/build-auto-installer-iso.sh
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@ -2602,6 +2602,7 @@ if [ ! -f "$EFI_IMG" ]; then
-c isolinux/boot.cat \ -c isolinux/boot.cat \
-b isolinux/isolinux.bin \ -b isolinux/isolinux.bin \
-no-emul-boot -boot-load-size 4 -boot-info-table \ -no-emul-boot -boot-load-size 4 -boot-info-table \
-partition_offset 16 \
"$INSTALLER_ISO" "$INSTALLER_ISO"
else else
xorriso -as mkisofs -o "$OUTPUT_ISO" \ xorriso -as mkisofs -o "$OUTPUT_ISO" \
@ -2616,6 +2617,7 @@ else
-e boot/grub/efi.img \ -e boot/grub/efi.img \
-no-emul-boot \ -no-emul-boot \
-isohybrid-gpt-basdat \ -isohybrid-gpt-basdat \
-partition_offset 16 \
"$INSTALLER_ISO" "$INSTALLER_ISO"
fi fi