I have finished installing ubuntu on my SSD. Before Installation, I set up the disk partition to gpt with GParted. During Installation, I have done the following partion:

/dev/sda1 EFI 500 MB

/dev/sda2 ext4 120 GB

But, after reboot, the EFI partition is not detected in my UEFI BIOS (InsydeH20 running on a ACER ASPIRE7). UEFI and Secure Boot are enabled. Any help would be really appreciated.

  • what do you mean not detected? does it boot? what error do you get?
    – ravery
    Jan 19, 2018 at 14:10
  • No, the EFI partition (where grub is) is not detected by firmware.
    – Nico
    Jan 19, 2018 at 14:12
  • It must be FAT32, I believe. Is it?
    – user692175
    Jan 19, 2018 at 14:13
  • Yes i did FAT32 formating with boot and esp flags.
    – Nico
    Jan 19, 2018 at 14:14
  • 1
    the path would be HDD0/EFI/ubuntu/ . if shimx64.efi is not there then grub didn't get installed
    – ravery
    Jan 19, 2018 at 14:23

1 Answer 1


In the end, I had to use grub-restore to make my efi partition visible again by the firmware. No clue what happened.

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