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

[Donald]

Hi -

I believe I'm experiencing this issue on my Thinkpad X1 Extreme (Gen1).
I set up a dual-boot, Ubuntu (Groovy) and Win11 beta. I'd be able to
select my OS in a Grub2 menu, after the Lenovo splash screen on start
up.

When I was navigating Ubuntu today, I was notified of the available
upgrade to 21.04 and went through the steps to upgrade.

At the end of the steps, I needed to reboot my machine:
1) Lenovo splash screen
2) Grub2 menu
3) Select Ubuntu
4) Screen goes black and is unresponsive
5) Hold power to shutdown/restart

After noticing the issue with booting into Ubuntu, I tried to boot into
Windows and experienced the same issue - black, unresponsive screen.

I tried several times to boot Ubuntu in recovery mode via advanced
options and no dice.

This is a really crummy issue that's rendered my laptop unusable.

-D.

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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 Xenial:
  Fix Released
Status in shim source package in Hirsute:
  Fix Released
Status in shim-signed source package in Hirsute:
  Fix Released

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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