This bug was fixed in the package grub-installer - 1.68ubuntu5.2
--------------- grub-installer (1.68ubuntu5.2) precise-proposed; urgency=low
* Always use grub-efi-amd64-signed on 64bit UEFI systems instead of relying on SecureBoot detection. (LP: #1184297) -- Stephane Graber <email address hidden> Fri, 19 Jul 2013 14:11:15 -0400
This bug was fixed in the package grub-installer - 1.68ubuntu5.2
---------------
grub-installer (1.68ubuntu5.2) precise-proposed; urgency=low
* Always use grub-efi- amd64-signed on 64bit UEFI systems instead of
relying on SecureBoot detection. (LP: #1184297)
-- Stephane Graber <email address hidden> Fri, 19 Jul 2013 14:11:15 -0400