I've tried to install various distros on my laptop quite a few times. As a result, some pretty weird stuff has happened regarding my bootloader. Or rather, my bootloaders. Note that I am not dual booting.
Whenever I turn my computer on and choose Ubuntu from the (first) GRUB menu, it says error symbol 'grub_efi_secure_boot' not found. But if I go to my computer's BIOS/UEFI settings, and exit, it shows two OS bootloaders on the same hard drive (I have one 256GB SSD): GRUB and ubuntu. When I choose GRUB, it takes me to the first, broken bootloader. But when I choose ubuntu, it boots perfectly fine into Ubuntu 20.04.
Some potential causes for this could be:
- Me trying to install 18.04 once with the bootloader in
/dev/nvme0n1, and another time in/dev/nvme0n1p1 - Me trying to fix my 18.04 install by running
grub-install /dev/nvme0n1 --efi-directory=/boot(I later installed 20.04 and that is what I'm currently using)
I've tried boot repair from a live USB, and it did nothing. My theory is that I have one bootloader on /dev/nvme0n1, and one in /dev/nvme0n1p1 (which is mounted to /boot/efi). However, I have no idea how to confirm this or fix anything.
Also, I thought the contents of my /boot and /boot/efi folders looked a bit strange, so I put the directory tree in a pastebin if it helps.
