Hi Ben,
It is a known fact that Ubuntu has switched its build process closer to
the Debian iso build process.
I contacted several Ubuntu developers (specifically those who are
responsible for the iso creation) during our previous dev cycle. Here is
the information gathered back then:
https://trac.osgeo.org/osgeo/ticket/1761
We decided not to switch our build method since this would require too
much effort.
Now what you propose is something that sounds easier than switching to
the new Ubuntu build process.
Can you please make a pull request to include those extra isohybrid
commands?
Cheers,
Angelos
On 12/02/2016 01:16 AM, Ben Caradoc-Davies wrote:
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/boot.cat
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,
--
Angelos Tzotsos, PhD
OSGeo Charter Member
http://users.ntua.gr/tzotsos
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