I was trying to install Ubuntu 14 (64-bit) on a Aspire V5-531, preinstalled Win 8. In the bios I can flag:

boot mode UEFI, secure boot DISABLE

  • in this case the neither installation USB card nor cd rom start

boot mode in Legacy Mode

  • I can install Ubuntu 14, but grub doesn't work (yes, I used boot repair, but it doesen't work properly).

1 Answer 1


I resolved it this way:

  • let boot mode UEFI enabled, secure boot enabled
  • 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 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! :)


Before I did all this, I freed the space for my partitions under Windows 8. I read so many guide about UEFI and UEFI install (I give advice to do it!), and tried in several ways. That was the only way I was able to do what I wanted.

  • 1
    perfect thanks.......I had a different model but once reading Select an UEFI file as trusted for executing everything fell into line.....Also if its blacked out simply add a supervisor password and continue :)
    – damien
    Commented May 8, 2017 at 14:45
  • 1
    May you post a link to a good EFI guide you found valuable of those you mentioned in your post? Commented Feb 6, 2019 at 9:11
  • 1
    @FrancescoMM Google mi è stato d'aiuto (5 anni fa)
    – feligiotti
    Commented Feb 8, 2019 at 20:53
  • @feligiotti Haha, ok, I'll try googling too, today. Commented Feb 18, 2019 at 18:37
  • this answer is a saver. merci beacoup!!! Commented Oct 17, 2020 at 13:28

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