[Bug 1925010] Re: shim-signed 15.4 does not boot on EFI 1.10 systems

[MikeMecanic]

Fresh installed HH final ISO alongside Windows 10 secure boot enabled.
Proposed must be enabled in Hirsute (9 packages):

sudo apt install shim-signed
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be upgraded:
  shim-signed
1 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
Need to get 447 kB of archives.
After this operation, 1,024 B of additional disk space will be used.
Get:1 http://mirrors.edge.kernel.org/ubuntu hirsute-proposed/main amd64 shim-signed amd64 1.47+15.4-0ubuntu2 [447 kB]
Fetched 447 kB in 1s (865 kB/s)
Preconfiguring packages ...
(Reading database ... 159131 files and directories currently installed.)
Preparing to unpack .../shim-signed_1.47+15.4-0ubuntu2_amd64.deb ...
Unpacking shim-signed (1.47+15.4-0ubuntu2) over (1.46+15.4-0ubuntu1) ...
Setting up shim-signed (1.47+15.4-0ubuntu2) ...
Trying to migrate /boot/efi into esp config
Installing grub to /boot/efi.
Installing for x86_64-efi platform.
Installation finished. No error reported.

mokutil --sb
SecureBoot enabled
SecureBoot validation is disabled in shim

uname -r
5.13.0-051300rc1-generic

sda           232.9G            
├─sda1 vfat     100M /boot/efi  
├─sda2           16M            
├─sda3 ntfs   150.1G            
└─sda4 ext4    82.6G /

All good!

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https://bugs.launchpad.net/bugs/1925010

Title:
  shim-signed 15.4 does not boot on EFI 1.10 systems

Status in shim package in Ubuntu:
  Fix Released
Status in shim-signed package in Ubuntu:
  Fix Released
Status in shim source package in Hirsute:
  Fix Committed
Status in shim-signed source package in Hirsute:
  Fix Committed

Bug description:
  The latest update on Hirsute made the MacBook Air from 2012
  unbootable.

  It could be recovered by booting a 20.04 live CD, downloading 20.04's
  shim package and overwriting the files in EFI/ubuntu and EFI/BOOT with
  the files shipped in the shim package.

  Machines Affected (not comprehensive):
  MacBookPro8,2
  MacBookAir5,2

  [Test case]
  For a system that has applied the workaround from https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1925010/comments/14 and is bootable:

  - install shim-signed from hirsute-proposed
  - reboot
  - verify that the system now boots without workaround

  This test case applies only to hirsute.  For all other series, there
  has been no regression, and because this is the same binary across all
  series, no other SRU testing is required.

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