Установите Ubuntu с использованием последовательного порта

, у меня есть набор из 6 компьютеров (3 встроенных компьютера и 3 SBC) без графического вывода. У каждого есть последовательный порт. Я хочу установить Ubuntu 20.04 Focal Server.

Когда я пытаюсь загрузиться с помощью ubuntu-20.04-live-server-amd64.iso, я получаю следующий результат

graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Loading bootlogo...

Initializing gfx code..
graphics initialization failed
Error setting up gfxboot
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot:
Could not allocate memory.
boot: