Failure installing Ubuntu 24.04 on an USB stick

[Ralf Mardorf]

On Fri, 2024-08-16 at 12:37 +0200, Volker Wysk wrote:
> There's just one very small first (1 MB) partition, with a file
> system unrecognized by Gparted. In the second partition, which encompasses
> most of the place, there's a "/boot" directory, but it includes only four
> small files, with names beginning with "memtest86".

PS:

Oops, I was too fast with my reply.

Very small unallocated space doesn't matter, I've seen this sometimes,
too, but it should not be a partition, just unallocated space.

However, you seem not to have a bootloader config or a kernel at all.
The result, a black screen with a blinking white _ is the same, it's
just not that easy to solve.