[Bug 1855574] Re: grub-efi-amd64-signed (1.93.15+2.02-2ubuntu8.14) failed to upgrade

[lvm]

Currently ubuntu EFI entry is gone

# efibootmgr -v 
BootCurrent: 0000
Timeout: 1 seconds
No BootOrder is set; firmware will attempt recovery
Boot0001* Hard Drive    BBS(HD,,0x0)
Boot0004  Built-in EFI Shell    VenMedia(5023b95c-db26-429b-a648-bd47664c8012)/FvFile(c57ad6b7-0515-40a8-9d21-551652854e37)
Boot0007* Removable Drive       BBS(Floppy,,0x0)Generic Ultra HS-SD/MMC.

and I cannot add it back

# efibootmgr -c -g -w -L "ubuntu" -l "\EFI\ubuntu\shimx64.efi"
Could not prepare Boot variable: Invalid argument

(/boot/efi is /dev/sda1)

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https://bugs.launchpad.net/bugs/1855574

Title:
  grub-efi-amd64-signed (1.93.15+2.02-2ubuntu8.14) failed to upgrade

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  During the routine upgrade grub-efi-amd64-signed
  (1.93.15+2.02-2ubuntu8.14) returned an error:

  Setting up grub-efi-amd64-signed (1.93.15+2.02-2ubuntu8.14) ...
  Installing for x86_64-efi platform.
  Could not delete variable: Invalid argument
  grub-install: error: efibootmgr failed to register the boot entry: Block device required.
  dpkg: error processing package grub-efi-amd64-signed (--configure):
  installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
  grub-efi-amd64-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  
  Linux server 5.0.0-36-generic #39~18.04.1-Ubuntu SMP Tue Nov 12 11:09:50 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

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