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I have an acer laptop (originally came with Windows) with InsydeH20 Setup Utility as the F2 menu. As a newb to Linux, I installed Ubuntu Desktop and I regretted adding disk encryption and I figured out quickly that it wasn't easy, so I just wiped the drive. I set it up and had to add a 'Trusted UEFI file to execute' with F2 by adding EFI/ubuntu/shimx64.efi as UbuntuFS.

Now, when I press F2 and navigate to 'Boot', I see an entry for my old Ubuntu FS as EFI File Boot 0: UbuntuFS. I'd like to remove that.

I have seen two answers already telling me to use a USB or CD to use Terminal and sudo efibootmgr -b x -B and it will NOT go away. I installed Ubuntu a second time and tried setting the UEFI Trusted file (what I did the first time) but it said 'Boot Description is exist'. It actually showed two options, one named ubuntu and UbuntuFS so I removed both. Using F12 to boot onto 'UbuntuFS' also says there's nothing to boot to.

So, can I reset my BIOS or UEFI to at least reset or preferably remove the boot priority to remove 'UbuntuFS' from my boot list? Boot mode is UEFI and Secure Boot is on. The EFI File appears as the last option in priority. Currently, the laptop is in an unusable state and only has access to my bootable USB, bios menu, and has an EFI option for a OS that is no longer on my HDD.

I have seen:

I have wasted time with:

  • Removing the CMOS and Laptop battery to wipe BIOS (doesn't do anything) (Attempt to wipe boot options)
  • Running between Windows 10 and Linux install USBs to delete 'EFI/ubuntu' (still shows up on F2)
  • Tried 'bcdedit /enum' and 'bcdedit /delete' on Windows 10
  • Wiped the entire HDD clean using GParted on a Linux USB, including the EFI partition
  • About to try this...

Please tell me that there's something EASY for this, I've sunk way too much time figuring this out with no avail.

SomePerson
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  • What is the output of sudo efibootmgr ? (Edit your question and add the output). – Enterprise Aug 07 '22 at 20:27
  • Does this help? https://www.minitool.com/data-recovery/what-is-acer-boot-menu-how-to-acces-change.html – user10489 Aug 07 '22 at 20:52
  • efibootmgr initially showed ubuntu and UbuntuFS, so I removed both. Then after running the instructions from the linked AU post and going back to the F2 menu and back into Linux it shows ubuntu. – SomePerson Aug 07 '22 at 21:03
  • That is correct, then. ubuntu is the entry for your current OS. – Enterprise Aug 07 '22 at 22:35
  • i reinstalled ubuntu for a third time and I can definitely NOT get in. Setting it as the trusted UEFI executable file through setup utility says 'file is exist' and won't let me create another entry. – SomePerson Aug 07 '22 at 23:39
  • I managed to get into my drive, by using the USB installer and hitting 'boot next volume' until I got past a security boot fail warning. Tried sudo efibootmgr and still got UbuntuFS. Repeated this process twice and I still see it. – SomePerson Aug 08 '22 at 00:13

1 Answers1

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In the Setup Utility, or the F2 menu, there WAS an option that wiped the EFI File list.

Under Security is Erase all Secure Boot Setting and Restore Secure Boot to Factory Default. I'm pretty sure I enabled both options and immediately exited because it did nothing to the boot order.

All I had to do was to hit those two options, then save. Next time I opened up the F2 menu, UbuntuFS was gone.

SomePerson
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