So I installed Pop OS on an old mac book air. Then I decided to wipe it off and install Lubuntu. However I could never find the bootable USB with the lubuntu iso in my boot menu. I know that pop os isn't using grub and instead the systemd init system. I don't know, however, if this has anything to do with it.
I then installed the boot-repair tool and made somechanges and rebooted it again. Now I'm stuck in Grub telling me that:
Failed to se MokListRT: Invalid Parameter
...
I can do an ls and get the following
(proc) (hd0) (hd0.msdos1) (hd1) (hd1.gpt4) (hd1.gpt3) (hd1.gpt2) (hd1.gpt1)
Within the hd0 I can list
efi/ loader/ and some hash-like number
Within efi I can then see
Reovery-7DD.../ POP_OS... systemd/ boot/ Linux/ pop/
It's just that I'm really list here. In first place I don't know why I could never find my bootable USB (I always just saw Pop OS and Pop OS recovery when hitting F7 when starting up). And now I'm completely lost.
I know there is this answer Stuck at GRUB command line, but still I'm not really making progress. I'd be thankful for any pointer to anything
systemdexists in the Linux kernel, andgrubis run by your machine before Linux is actually started (it's a boot loader and is run by the machine BIOS/uEFI firmware directly before Ubuntu or the OS starts). Grub firstly loads initrd (initial ram disk) then booted the Linux kernel (which will cause systemd to start)... I suspect Pop OS usesgrublike Ubuntu does (I doubt it uses LiLo or another boot loader, though Ubuntu supports LiLo & other bootloaders too), but with a single OS the grub menu may not show unless a key is struck. – guiverc Oct 27 '20 at 08:53