A resposta foi postada sobre no askUbuntu e funcionou para mim. Obrigado @ gio900. Eu tenho copy & colou a resposta abaixo (para evitar links quebrados):
So I resolved in the simplest way:
- let boot mode UEFI enable, secure boot enable
- in bios added the USB boot file of the distribution I want to install as trusted for executing:
- My bios is: Phoenix SecureCore Tiano Setup
- under Boot I flag Boot Mode UEFI
- Secure Boot ENABLE
- under SECURITY i select: "Select an UEFI file as trusted for executing"
- in "Available File System" i select fs0:$nameofmyusbkey
- select [EFI]
- select [BOOT]
- select BOOTx64.EFI
- give it the name "whateveryouwant" then, using tab, select YES.
- so I go to the Boot option, then put "whateveryouwant" as first in the Boot priority order
- then I was able to start Ubuntu installation in UEFI mode! :)
WARNIG!
before I did all them, I free the space for my partitions under win8, I read so many guide about UEFI and UEFI install (I give advice to do it!), and try in several way. That was the only way I was able to do what I want
Observação: para adicionar itens ao boot priority order
, você deve ter o Secure Boot
definido como Enabled
....