[Bug 1892754] Re: Unable to boot in UEFI+secure boot mode

[sudodus]

... continuing:

This is when using the boot option in the temporary boot menu (F12)

"Linpus Lite (<name of the USB drive>)"

in the picture attached to the previous comment. This is the only
available USB boot option in UEFI mode.

Then I turned off UEFI mode and set teh computer to boot in 'legacy
mode'. Now there were more boot options in the temporary boot menu
(F12). These options are shown in the picture attached to the previous
comment. The option

"USB Hdd:  <name of the USB drive>"

*works* also with USB drives cloned from the current Ubuntu Groovy as
well as Lubuntu Groovy.

So the problem in this case is not due to secure boot, but the "Linpus
Lite" boot option does not work with the current Groovy iso files. It
works with older iso files including Ubuntu 20.04.1 LTS and Groovy iso
files from before you modified the boot system (when you removed
syslinux boot in BIOS mode, but obviously also modified the boot system
in UEFI mode).

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https://bugs.launchpad.net/bugs/1892754

Title:
  Unable to boot in UEFI+secure boot mode

Status in cd-boot-images-amd64 package in Ubuntu:
  Fix Released

Bug description:
  The problem:

  Trying to install the QA daily build for Kubuntu Groovy 20200824 -
  when booting from the USB boot media I receive the following error:

  Error

  Verification failed: 
  (0x1A) security violation 

  Followed by an OK box - which when selected offers to import the SHIM
  key

  This error occurred on 2 machines running in UEFI+secure boot mode:

  1: Dell [Inspiron] 3521, (i3-3217U, 4GB, Intel HD Graphics 4000, Intel
  HM76 chipset 10/100 Mbps ethernet controller integrated on system
  board, WiFi 802.11 b/g/N, Bluetooth 4.0, 500 GB hd)

  2: Acer [Aspire] E3-111-P60S (Pent.N3530, 4GB, Intel HD Graphics,
  Realtek  RTL8111/81681/8411 GB Ethernet, Qualcomm Atheros AR9462
  Wireless, Bluetooth Atheros A315-53, 500 GB hd)

  Disabling secure boot the machines then boot normally in UEFI mode

  Will test further some of the other flavors..

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