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

[Launchpad Bug Tracker]

This bug was fixed in the package shim - 0.4-0ubuntu3

---------------
shim (0.4-0ubuntu3) saucy; urgency=low

  [ Steve Langasek ]
  * Install MokManager.efi.signed in the package.
  * debian/patches/no-output-by-default.patch: Don't print any
    informational messages.  Closes LP: #1074302.

  [ Stéphane Graber ]
  * debian/patches/no-print-on-unsigned: Don't print an error message when
    validating an unsigned binary as that tends to hang Lenovo machines.
    (LP: #1087501)
 -- Stephane Graber <stgraber at ubuntu.com>   Thu, 08 Aug 2013 17:12:12 +0200

** Changed in: shim (Ubuntu)
       Status: Incomplete => Fix Released

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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:
  Fix Released

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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