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Good morning, I started my computer this morning to find the Grub_ menu prompt error I assume.

I tried the boot-repair option with no luck. I am using Ubuntu 18.04 LTS only no dual boot and my main drive is encrypted with Ubuntu. I'm not sure what caused this as it was working fine yesterday. I will post some information to hopefully help with any questions. Any help would be greatly appreciated.

Output of boot-repair link below

https://pastebin.com/DhLw0Y1L

Sean
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  • Are you getting grub menu or grub> or grub rescue> ? – oldfred Nov 23 '18 at 18:13
  • Are you getting grub menu or grub> or grub rescue> ? Have you tried enter, typing exit & enter or a chroot type boot? Do not know LVM, so commands would be different for UEFI, LVM & encrypted partition. See: https://askubuntu.com/questions/53578/can-i-install-in-uefi-mode-with-the-alternate-installer/57380#57380 – oldfred Nov 23 '18 at 18:19
  • It’s the GNU Grub menu. I’ve tried exit and enter – Sean Nov 24 '18 at 01:12
  • If you get grub menu, have you tried recovery mode? It then gives options to command line or boot. You may then need to mount LVM and run fsck on it. – oldfred Nov 24 '18 at 04:31
  • So I cannot access recovery mode. I followed the instructions from here https://www.linux.com/learn/how-rescue-non-booting-grub-2-linux%20%20

    The results aren't showing any of the files.

    ls gives me (hd0,gpt3) (hd0,gpt2) (hd0,gpt1) (hd1) ls (hd0,gpt3) shows unknown filesystem ls (hd0,gpt2) show lost&found /efi /boot /grub mem.test abi. initrd. system.map vmlinuz.* ls (hd0,gpt1) shows efi/ boot/ ls (hd0,1) shows efi/ boot/

    So I'm not finding any files to finish the steps.

     – Sean Nov 25 '18 at 18:52
  • Also when I installed Ubuntu I did a full disk encryption. I am able to boot from my live cd and trying to fix it from here. I read a few questions where the disk encryption was alittle different. If that helps any. – Sean Nov 25 '18 at 19:59
  • Full disk encryption is a lot different, plus it uses LVM, volumes for system & swap, not partitions. https://askubuntu.com/questions/719409/how-to-reinstall-grub-from-a-liveusb-if-the-partition-is-encrypted-and-there-i – oldfred Nov 25 '18 at 20:36
  • Yes I have found that link and been trying to get it to work. I'm stuck with two issues. I'm guessing I didn't mount /sys and a bad resolving address to get grub. root@ubuntu:/# sudo grub-install /dev/sda Installing for i386-pc platform. device node not found root@ubuntu:/# apt-get install --reinstall grub-efi-amd64 Reading package lists... Done Building dependency tree
    Reading state information... Done 404 Not Found [IP: 91.189.91.26 80]     – Sean Nov 25 '18 at 21:06
  • Not not know LVM. But grub-pc is BIOS and grub-efi-amd64 is UEFI. You only need one or other depending on whether your install is BIOS or UEFI. – oldfred Nov 25 '18 at 21:30
  • I'm fairly certain its UEFI. When I follow the instructions on the link you posted I get a 404 not found for the grub install. When I follow the instructions on https://ubuntuforums.org/showthread.php?t=2266650 I get to installing grub and it says DEVICE NODE NOT FOUND. Thanks so much for your help btw. – Sean Nov 25 '18 at 21:40
  • Ok just starting at the beginning if you could walk me through. I am stuck at /dev/[VOLUME GROUP NAME]/[LOGICAL VOLUME NAME] /mnt root@ubuntu:~# /dev/ubuntu-vg/root /mnt not working Found volume group "ubuntu-vg" using metadata type lvm2 root@ubuntu:~# lvscan ACTIVE '/dev/ubuntu-vg/root' [<221.40 GiB] inherit ACTIVE '/dev/ubuntu-vg/swap_1' [980.00 MiB] inherit – Sean Nov 25 '18 at 22:04
  • Do not know LVM. You might try Boot-Repair, but before doing anything with it, be sure to mount LVM & un-encrypt your install. https://help.ubuntu.com/community/Boot-Repair – oldfred Nov 25 '18 at 22:09

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