[Bug 1936759] Re: shim-signed 1.48+15.4-0ubuntu5 does not secure boot

[Chris Guiver]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. Please execute the following command only once, as it
will automatically gather debugging information, in a terminal:

apport-collect 1936759

When reporting bugs in the future please use apport by using 'ubuntu-
bug' and the name of the package affected. You can learn more about this
functionality at https://wiki.ubuntu.com/ReportingBugs.


(I realize you cannot boot with the impacted shim package; but please run this command on the same box using the prior shim package to enable boot. Thank you for taking the time to report)

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https://bugs.launchpad.net/bugs/1936759

Title:
  shim-signed 1.48+15.4-0ubuntu5 does not secure boot

Status in shim-signed package in Ubuntu:
  New

Bug description:
  shim-signed package installs with no error with apt upgrade, but then
  the system cannot boot afterwards with secure boot enabled. System
  hangs indefinitely on UEFI manufacturer logo screen (Dell in this
  case), not getting as far as grub. Disabling secure boot is a
  workaround.

  Rolling back to previous shim-signed version 1.46+15.4-0ubuntu1 fixes
  the problem (system can once again boot with secure boot enabled).

  Done this for now to allow secure boot to be enabled:
  $ sudo apt install shim-signed=1.46+15.4-0ubuntu1
  $ sudo apt-mark hold shim-signed

  Details of system where problem is observed:
  - Dell XPS 13 7390 laptop
  - Intel® Core™ i7-10510U CPU / 16GB RAM
  - BIOS/UEFI firmware version: v1.8.0 (latest)
  - Ubuntu hirsute 21.04 64bit (Linux only, single OS, not dual booting)
  - Kernel version: 5.11.0-22-generic
  - GRUB: 2.04-1ubuntu45

  Any questions / additional info, please ask.

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