This bug was fixed in the package debian-installer - 20101020ubuntu406
--------------- debian-installer (20101020ubuntu406) xenial; urgency=medium
* If KERNELNAME_ALT_SUFFIX is specified, require a signed grub too. * Fix grub-signed download code to cope with new apt (LP: #1525393)
-- Adam Conrad <email address hidden> Fri, 11 Dec 2015 17:48:00 -0700
This bug was fixed in the package debian-installer - 20101020ubuntu406
---------------
debian-installer (20101020ubuntu406) xenial; urgency=medium
* If KERNELNAME_ ALT_SUFFIX is specified, require a signed grub too.
* Fix grub-signed download code to cope with new apt (LP: #1525393)
-- Adam Conrad <email address hidden> Fri, 11 Dec 2015 17:48:00 -0700