[Bug 1869558] Re: After the update of "grub-efi-amd64-signed 1.93.16+2.02-2ubuntu8.15" ubuntu doesn't boot (Block device required error)

[youw]

I also have a Dell notebook, and also can't boot when updated to 1.93.16+2.02-2ubuntu8.15. It won't boot even in recovery mode. It freezes before the splash screen, or at the message "loading initial ramdisk" when in recovery mode. I had to boot by usb media, then chroot, and then, downgrade to version 1.93.15+2.02-2ubuntu8.14 (not present in repositories, but found at ubuntu 18.04.4 amd64 iso).
My notebook is a Dell Inspiron 15 Gaming 7567, 16 GB RAM, CPU: Intel(R) Core(TM) i7-7700HQ, Nvidia GeForce GTX 1050 Ti, kernel: 5.3.0-46-generic.

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Title:
  After the update of "grub-efi-amd64-signed 1.93.16+2.02-2ubuntu8.15"
  ubuntu doesn't boot (Block device required error)

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  After the installation of the new version of this package, the system
  doesn't boot. I have to enter in "Recovery Mode".

  $ lsb_release -rd
  Description:	Ubuntu 18.04.4 LTS
  Release:	18.04

  $ apt-cache policy grub-efi-amd64-signed
  grub-efi-amd64-signed:
    Installed: 1.93.16+2.02-2ubuntu8.15
    Candidate: 1.93.16+2.02-2ubuntu8.15
    Version table:
   *** 1.93.16+2.02-2ubuntu8.15 500
          500 http://it.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.93+2.02-2ubuntu8 500
          500 http://it.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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