[Bug 1087501] [NEW] Unable to boot unsigned kernel, boot freezes in shim call

[Stéphane Graber]

Public bug reported:

On a Lenovo x230 with secureboot enabled, I can only boot signed kernel.

Initially this was thought to be a grub2 issue but after investigation
(added debug code in grub and running with debug=all), it was determined
that the last thing grub does before the freeze is call a shim hook.

The current workaround is to either disable secureboot or use a signed
kernel.

** Affects: shim (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1087501

Title:
  Unable to boot unsigned kernel, boot freezes in shim call

Status in “shim” package in Ubuntu:
  New

Bug description:
  On a Lenovo x230 with secureboot enabled, I can only boot signed
  kernel.

  Initially this was thought to be a grub2 issue but after investigation
  (added debug code in grub and running with debug=all), it was
  determined that the last thing grub does before the freeze is call a
  shim hook.

  The current workaround is to either disable secureboot or use a signed
  kernel.

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