The list of known issues contains this section:
"ThinkPad X220, X230, T430, T520, T530 and E325
"These machines do not start on USB sticks created using Tails USB
Installer, due to a firmware limitation.
"A workaround for some of these machines is to use the manual
installation process. Note, however, that this technique does not allow
you to set up a persistent volume."
https://tails.boum.org/support/known_issues/#index9h2
I own a different Lenovo model which might be affected by this issue.
The text above seems to indicate that the problem occurs while reading
the data on the stick, but I am not sure if that is correct.
I tried to find more information about the "firmware limitation" but
found nothing so far. Can anyone here provide more information?
Cheers,
Andreas