Live session doesn't start on mantic arm64 desktop daily

[Paul Rockwell]

Upon booting the Mantic arm64 desktop daily ISO (dated 2023-07-03), the live environment is not started. Instead, the graphical login displays a username/password prompt. None of the usual suspects (ubuntu or mantic) are accepted.

During the boot, several messages appear on the text console indicating that username "ubuntu" was not found. If the ISO is booted to single user mode, /etc/passwd does not contain any username 'ubuntu'.

The ISO is being installed on a virtual machine - VMware Fusion 13, Mac mini M1 (2020) Apple silicon CPU.
Mantic server daily builds do install and work properly, so whatever the issue is, it's with the Desktop daily build.

[Tim Andersson (andersson123)]

I'm having trouble booting up an arm64 vm, but as some added info this is not the case for the amd64 image of the same day.

Running on an amd64 lunar desktop with virt-install

[Tim Andersson (andersson123)]

I'm having virtualization issues but I believe I've run into the same issue despite this:
```
EFI stub: ERROR: FIRMWARE BUG: kernel image not aligned on 64k boundary

passwd: user 'ubuntu' does not exist
install: invalid user 'ubuntu'
install: invalid user 'ubuntu'
sudo: unknown user ubuntu
sudo: error initializing audit plugin sudoers_audit
Using CD-ROM mount point /cdrom/
Identifying... [2d6b33274fa920c7fff3c9b75a1852fd-2]
Scanning disc for index files...
Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu 23.10 _Mantic Minotaur_ - Daily arm64 (20230703)'
This disc is called:
'Ubuntu 23.10 _Mantic Minotaur_ - Daily arm64 (20230703)'
Copying package lists...gpgv: Signature made Mon Jul 3 15:29:14 2023 UTC
gpgv: using RSA key 843938DF228D22F7B3742BC0D94AA3F0EFE21092
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key (2012) <email address hidden>"
Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu 23.10 _Mantic Minotaur_ - Daily arm64 (20230703)]/ mantic main restricted
Repeat this process for the rest of the CDs in your set.
chown: invalid user: 'ubuntu.ubuntu'
chown: invalid user: 'ubuntu.ubuntu'
chown: invalid user: 'ubuntu.ubuntu'
```

Running on the same system as mentioned before with emulation.

[Steve Langasek (vorlon)]

syslinux is an x86-specific bootloader, unrelated to arm64 daily images (or usernames in live environments). Reassigning to casper.

[Sebastien Bacher (seb128)]

Thanks, I think that's the same as bug #2025068