[Bug 2043907] Re: Memtest gives "bad shim signature" error

[Beyil]

this may tie into another bug that may or may not have been fixed. I
have a Multiboot system. When I had it running with the MBR style of
only one boot drive, grub kept getting overwritten with the other
distro's. As long as it was one of the ubuntu flavors I had no issues
but as soon as it was debian or fedora going to ubuntu it gave a shim
mismatch error and would not boot. I ended up stripping out all of the
boot selectors and then setting up an EFI partition on each distro's
drive to keep them all separated to their own drive, then using the UEFI
boot selector to set which drive and distro to boot from. this included
telling the installer to use the drive that distro was going to and
setting the EFI flag to datadrive on all the EFI boot partitions save
the one that that distro was being installed to so it would not install
on a different drive despite what it was told in the installer...
updating is not an issue as it doesn't attempt to redo the drive mapping
unlike the initial installer, anyways I degressed into another issue but
it giving that mismatch may also extend to this issue...

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https://bugs.launchpad.net/bugs/2043907

Title:
  Memtest gives "bad shim signature" error

Status in memtest86+ package in Ubuntu:
  New

Bug description:
  when you select memtest from the Grub menu with Secure boot enable you
  get the error of "Bad Shim Signature" I should not need to disable
  secure boot just to run this test, which then opens up the system for
  other security issues...

  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: memtest86+ 6.20-3
  ProcVersionSignature: Ubuntu 6.2.0-36.37-generic 6.2.16
  Uname: Linux 6.2.0-36-generic x86_64
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Sat Nov 18 17:30:24 2023
  InstallationDate: Installed on 2023-10-22 (28 days ago)
  InstallationMedia: Kubuntu 23.04 "Lunar Lobster" - Release amd64 (20230414.1)
  SourcePackage: memtest86+
  UpgradeStatus: Upgraded to mantic on 2023-11-18 (1 days ago)

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