On Wed, Oct 14, 2020 at 08:04:19AM -0000, sudodus wrote:
> The current Groovy iso files of Lubuntu and Xubuntu have a later date
> and time (from zsync), yet they fail to boot the HP Elitebook 8560p.

> Is this because the latest tweak suggested by Thomas Schmitt is only
> present in the Ubuntu Groovy iso file, or is there some other cause of
> this difference?

All Ubuntu flavors use the same bootloader logic; there is no distinction
here.

And I have checked that the latest xubuntu image has the same partition
setup.

Ubuntu 20201014:

$ fdisk groovy-desktop-amd64.iso

Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p
Disk groovy-desktop-amd64.iso: 2.76 GiB, 2939303936 bytes, 5740828 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: B4C6B0BE-D645-4E64-8EB9-B4C4C650029D

Device                      Start     End Sectors  Size Type
groovy-desktop-amd64.iso1      64 5730211 5730148  2.7G Microsoft basic data
groovy-desktop-amd64.iso2 5730212 5740163    9952  4.9M EFI System
groovy-desktop-amd64.iso3 5740164 5740763     600  300K Microsoft basic data

Command (m for help): M
Entering protective/hybrid MBR disklabel.

Command (m for help): p
Disk groovy-desktop-amd64.iso: 2.76 GiB, 2939303936 bytes, 5740828 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device                    Boot Start     End Sectors  Size Id Type
groovy-desktop-amd64.iso1          1 5740827 5740827  2.8G ee GPT
groovy-desktop-amd64.iso2 *        0       0       1  512B  0 Empty

Partition table entries are not in disk order.

Command (m for help): q

$ 

Xubuntu 20201014:

$ fdisk groovy-desktop-amd64.iso

Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): p
Disk groovy-desktop-amd64.iso: 1.71 GiB, 1814708224 bytes, 3544352 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F

Device                      Start     End Sectors  Size Type
groovy-desktop-amd64.iso1      64 3533735 3533672  1.7G Microsoft basic data
groovy-desktop-amd64.iso2 3533736 3543687    9952  4.9M EFI System
groovy-desktop-amd64.iso3 3543688 3544287     600  300K Microsoft basic data

Command (m for help): M
Entering protective/hybrid MBR disklabel.

Command (m for help): p
Disk groovy-desktop-amd64.iso: 1.71 GiB, 1814708224 bytes, 3544352 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device                    Boot Start     End Sectors  Size Id Type
groovy-desktop-amd64.iso1          1 3544351 3544351  1.7G ee GPT
groovy-desktop-amd64.iso2 *        0       0       1  512B  0 Empty

Partition table entries are not in disk order.

Command (m for help): q

$


So a failure to boot Xubuntu where Ubuntu works is not explained by
missing/different xorriso options.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                   https://www.debian.org/
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