[Bug 1939950] Re: shim-signed fails to upgrade when NVMe drive is moved into the VM as Virtio drive

[Steve Langasek]

*** This bug is a duplicate of bug 1940723 ***
    https://bugs.launchpad.net/bugs/1940723

** This bug has been marked a duplicate of bug 1940723
   shim-signed fails to install if grub disk config is incorrect

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https://bugs.launchpad.net/bugs/1939950

Title:
  shim-signed fails to upgrade when NVMe drive is moved into the VM as
  Virtio drive

Status in shim-signed package in Ubuntu:
  New

Bug description:
  I had to remove a NVMe storage (nvme0n1) from my laptop and
  temporarily brought it back as a VirtIO (vda) device under a VM. When
  I received shim-signed upgrade to version 1.51+15.4-0ubuntu9 , I got
  this :

  Setting up shim-signed (1.51+15.4-0ubuntu9) ...
  mount: /var/lib/grub/esp: special device /dev/disk/by-id/nvme-eui.001b448b4993ceb4-part1 does not exist.
  dpkg: error processing package shim-signed (--configure):
   installed shim-signed package post-installation script subprocess returned error exit status 32
  Errors were encountered while processing:
   shim-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  Looking into /var/lib/dpkg/info/shim-signed.postinst , I see that it
  calls /usr/lib/grub/grub-multi-install which in turn gets this device
  name from debconf DB, which it then fails to find among VM devices.

  Looking into /var/cache/debconf/config.dat , I see it recorded under Name: grub-efi/install_devices , also its nvme0n1p1 partition recorded under Name: grub-efi/partition_description .
  I am not sure whether it is safe to remove or modify these values by text editor, but running grub-install or dpkg-reconfigure grub-efi-amd64 as root does not change them .

  Please help me to resolve this situation.

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