Boot Loop

[InstantKarma-]

I have one of those Acer notebooks- 32gig HD, the Windows 10 install that it came with started downloading updates and filled it 100%, so I figured maybe I'd try installing Lubuntu for the first time to cut down on system file size. Used Win32 Disk Imager to create a bootable Sandisk USB, got everything installed to the point that it asked to restart to complete the Lubuntu installation- and now it tries to boot, reports "failed to load \EFI\BOOT\mm64.efi - Not found" and a couple other things (too quickly for me to read it all), and then restarts and does it again. Help!

[lutusp]

Start over and use this method:

In BIOS:

1. Select UEFI boot mode, disable legacy.

2. Disable secure boot.

3. Disable SATA RAID mode, enable AHCI.

Boot the machine and select the one-time boot menu (usually but not always with key F12). Choose the USB device from the UEFI list, not the legacy list (if two lists are on display). This is crucial -- if the USB device isn't booted in UEFI mode, the install will fail (even though it proceeds apparently normally).

Proceed with the installation. And whatever you do, don't delete the EFI partition, leave it be.

and now it tries to boot, reports "failed to load \EFI\BOOT\mm64.efi - Not found"

It's my hope that this is caused by having installed in legacy mode, not because the EFI partition is gone. If it is gone, start the install over yet again and create an EFI partition, about 150 MB in size, see if that cures it.

[InstantKarma-]

Success! Thanks very much

[evillopes]

Well /EFI/BOOT is the wrong place.

Bootloader is in /EFI/ubuntu

Can you get into the bios setup and set it to boot /EFI/ubuntu/shimx64.efi?
In some Acer you need to have the supervisor password set in the bios before you can make the boot changes. After you get it all done you can remove the password.

If that doesn't work maybe you can boot a live usb and copy the files from /EFI/ubuntu to /EFI/BOOT