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Apologies in advance and I'm not an expert and I've got access to a machine previously configured without a lot of context.

I know it used to have windows but unsure it currently still has it. I know it us running Ubuntu 20.04 but to boot into it I need to type exit twice in grub.

I'm not Ubuntu expert, so started by looking at existing relevant answers. Here's what I've tried so far:

  1. based on this answer I've installed and grub-customizer and moved Ubuntu, with Linux 5.15.0-56-generic to the top (as this is what I see after running uname -a). (Bellow there's another similar entry: Ubuntu, with Linux 5.15.0-53-generic. Maybe there are two Ubuntu installs ?). I've saved/rebooted: didn't seem to make a difference/still need to type in exit twice after rebooting.
  2. based on this answer I've tried commenting out GRUB_TIMEOUT_STYLE, ran sudo update-grub and rebooted: still no joy.

In grub this is what I can see:

ubuntu grub menu

I don't fully undertsand why I need to type exit in grub , but my hunch is maybe there are two version of Ubuntu installed and the current config doesn't explicity boot into one ? (It doesn't list the typical OS select screen though).

How can configure grub so the machine boots into Ubuntu 20.04 on it's own, without me typing exit twice ?

George Profenza
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    Grub Customizer replaces grub's scripts with its own proxy scripts. Are you booting in BIOS or UEFI boot mode? And then if newer system with both modes available, is boot mode in UEFI/BIOS settings match boot mode of Ubuntu install? Please copy & paste the pastebin link to the BootInfo summary report ( do not post report), do not run the auto fix till reviewed. Use often updated ppa version over somewhat older ISO with your USB installer or any working install. https://help.ubuntu.com/community/Boot-Repair & https://sourceforge.net/p/boot-repair/home/Home/ – oldfred Dec 13 '22 at 23:43
  • Looks like BIOS: ls: cannot access '/sys/firmware/efi': No such file or directory, test -d /sys/firmware/efi && echo efi || echo bios outputs bios. In BIOS settings I see ubuntu as the first boot option. This is the BootInfo summary report. I've installed boot-repair as well, but haven't ran it yet. Thank you so much for the support. – George Profenza Dec 14 '22 at 00:12
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    You have UEFI system. You have BIOS grub in MBR and UEFI grub in ESP on MBR partitioned drive. Since only Ubuntu would be better to have been gpt whether UEFI or BIOS as only time to use MBR(msdos) is with Windows in BIOS boot mode. It looks like grub in ESP for UEFI boot is looking for a non-existent partiiton. But you have mount of ESP in fstab for UEFI boot. So is it trying to boot in UEFI mode, fails and then boots in BIOS mode? Because report was from BIOS, it did not show efibootmgr -v output which shows UEFI/BIOS boot entrees. – oldfred Dec 14 '22 at 04:31

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