The current ISO image osgeo-live-10.0-amd64.iso is not isohybrid, and lacks UEFI support. As far as I know, all current official Ubuntu live images have both. Shipping isohybrid images simplifies USB thumb drive creation because the ISO can then be written directly to a raw device with dd without needing any other processing, not to mention consistency with Ubuntu.

Does anyone object to changing the ISO build process to make isohybrid images with UEFI support? This should a matter of a few additional xorriso arguments.

The current ISO is suitable for MBR isohybrid but lacks UEFI support:

$ isohybrid -u osgeo-live-10.0-amd64.iso
isohybrid: osgeo-live-10.0-amd64.iso: unable to find efi image

The existing boot equipment of the ISO contains only MBR support:

$ xorriso -indev osgeo-live-10.0-amd64.iso -report_el_torito plain -report_system_area plain
xorriso 1.4.6 : RockRidge filesystem manipulator, libburnia project.

xorriso : NOTE : Loading ISO image tree from LBA 0
xorriso : UPDATE : 502 nodes read in 1 seconds
xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded
Drive current: -indev 'osgeo-live-10.0-amd64.iso'
Media current: stdio file, overwriteable
Media status : is written , is appendable
Boot record  : El Torito
Media summary: 1 session, 2062470 data blocks, 4028m data, 8267m free
Volume id    : 'OSGEOLIVE10'
El Torito catalog  : 164  1
El Torito cat path : /isolinux/
El Torito images   :   N  Pltf  B   Emul  Ld_seg  Hdpt  Ldsiz         LBA
El Torito boot img :   1  BIOS  y   none  0x0000  0x00      4         165
El Torito img path :   1  /isolinux/isolinux.bin
El Torito img opts :   1  boot-info-table isohybrid-suitable
xorriso : NOTE : No System Area was loaded

Kind regards,

Ben Caradoc-Davies <>
Transient Software Limited <>
New Zealand
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