[Bug 1815105] [NEW] 2.02-2ubuntu8.10 breaks booting from ZFS

[Michael Shannon]

Public bug reported:

Upon upgrading to grub 2.02-2ubuntu8.10 from 2.02-2ubuntu8.9 all of my
machines with /boot/grub on ZFS display a long list of the following
sort at boot, before reaching the GRUB menu.

Handle 0x49cb9b98
  /ACPI (a0341d0,0)/PCI (0,14)/USB(9.1)/EndEntire
  USB I/O
  device path
Handle 0x49cb1a1B
  loaded image
Handle 0x4a280e98
  d088a413-0a70-4217-ba55-9a3ch64c41b3

This goes on for thousands of lines.  On some machines this only takes a
few seconds but on other machines this takes over 5 minutes before the
GRUB menu is displayed.  This is not displayed nor is boot delayed when
using grub 2.02-2ubuntu8.9.

Secure boot has no effect on the result.

Machines with /boot/grub on ext4 do not exhibit this behavior.

System and package information below:

Description: Ubuntu 18.04.1 LTS
Release:     18.04

grub-common:
  Installed: 2.02-2ubuntu8.10
  Candidate: 2.02-2ubuntu8.10
  Version table:
 *** 2.02-2ubuntu8.10 500
        500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.02-2ubuntu8 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Upon upgrading to grub 2.02-2ubuntu8.10 from 2.02-2ubuntu8.9 all of my
  machines with /boot/grub on ZFS display a long list of the following
  sort at boot, before reaching the GRUB menu.
  
  Handle 0x49cb9b98
-   /ACPI (a0341d0,0)/PCI (0,14)/USB(9.1)/EndEntire
-   USB I/O
-   device path
+   /ACPI (a0341d0,0)/PCI (0,14)/USB(9.1)/EndEntire
+   USB I/O
+   device path
  Handle 0x49cb1a1B
-   loaded image
+   loaded image
  Handle 0x4a280e98
-   d088a413-0a70-4217-ba55-9a3ch64c41b3
+   d088a413-0a70-4217-ba55-9a3ch64c41b3
  
- This goes on for thousands of lines.  On some machines this only takes
+ This goes on for thousands of lines.  On some machines this only takes a
  few seconds but on other machines this takes over 5 minutes before the
  GRUB menu is displayed.  This is not displayed nor is boot delayed when
  using grub 2.02-2ubuntu8.9.
  
  Secure boot has no effect on the result.
  
  Machines with /boot/grub on ext4 do not exhibit this behavior.
  
- 
  System and package information below:
  
  Description: Ubuntu 18.04.1 LTS
  Release:     18.04
  
  grub-common:
-   Installed: 2.02-2ubuntu8.10
-   Candidate: 2.02-2ubuntu8.10
-   Version table:
-  *** 2.02-2ubuntu8.10 500
-         500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
-         100 /var/lib/dpkg/status
-      2.02-2ubuntu8 500
-         500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
+   Installed: 2.02-2ubuntu8.10
+   Candidate: 2.02-2ubuntu8.10
+   Version table:
+  *** 2.02-2ubuntu8.10 500
+         500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
+         100 /var/lib/dpkg/status
+      2.02-2ubuntu8 500
+         500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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https://bugs.launchpad.net/bugs/1815105

Title:
  2.02-2ubuntu8.10 breaks booting from ZFS

Status in grub2 package in Ubuntu:
  New

Bug description:
  Upon upgrading to grub 2.02-2ubuntu8.10 from 2.02-2ubuntu8.9 all of my
  machines with /boot/grub on ZFS display a long list of the following
  sort at boot, before reaching the GRUB menu.

  Handle 0x49cb9b98
    /ACPI (a0341d0,0)/PCI (0,14)/USB(9.1)/EndEntire
    USB I/O
    device path
  Handle 0x49cb1a1B
    loaded image
  Handle 0x4a280e98
    d088a413-0a70-4217-ba55-9a3ch64c41b3

  This goes on for thousands of lines.  On some machines this only takes
  a few seconds but on other machines this takes over 5 minutes before
  the GRUB menu is displayed.  This is not displayed nor is boot delayed
  when using grub 2.02-2ubuntu8.9.

  Secure boot has no effect on the result.

  Machines with /boot/grub on ext4 do not exhibit this behavior.

  System and package information below:

  Description: Ubuntu 18.04.1 LTS
  Release:     18.04

  grub-common:
    Installed: 2.02-2ubuntu8.10
    Candidate: 2.02-2ubuntu8.10
    Version table:
   *** 2.02-2ubuntu8.10 500
          500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       2.02-2ubuntu8 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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