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

[Stéphane Graber]

Attaching the shim binary (signed with the key from the other shim bug
report) I've been using for that successful boot. It's basically a
current saucy shim with a bunch of debug code added to write to nvram
and the problematic Print() call commented.

** Attachment added: "new-shim.efi"
   https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1087501/+attachment/3764887/+files/new-shim.efi

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

Status in “shim” package in Ubuntu:
  Incomplete

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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