linux-service via Tails-dev:
>I have download tails 6.19 iso and dd to usb stick.
>Uefi boot from usb stick is not possible on several computers. Bios
>boot is OK.
You mean you downloaded a file with ".iso" extension?
If that's the case, this might explain the problem: you are supposed to
use the .img file. Please follow our doc
https://tails.net/install/ and
report again.
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boyska