[Bug 1476882] Please test proposed package

[Chris J Arges]

Hello dann, or anyone else affected,

Accepted grub2-signed into vivid-proposed. The package will build now
and be available at
https://launchpad.net/ubuntu/+source/grub2-signed/1.46.5 in a few hours,
and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

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https://bugs.launchpad.net/bugs/1476882

Title:
  arm64: synchronous abort booting linux

Status in grub2 package in Ubuntu:
  Fix Released
Status in grub2 source package in Trusty:
  Fix Released
Status in grub2 source package in Vivid:
  Fix Committed
Status in grub2 source package in Wily:
  Fix Released

Bug description:
  [Impact]
  On some UEFI firmware implementations for ARM64 (debug versions of Tianocore, as well as builds from AMI), GRUB will fail with Synchronous Aborts when starting the Linux kernel. It is therefore not possible to install or run Ubuntu on these systems.

  [Test Case]
  Download the Ubuntu debian-installer netboot.tar.gz  and boot and direct a system to boot from the grubnet image within. (Currently only 15.10 and newer have this tarball, though it should eventually appear in 14.04 as an SRU).

  [Regression Risk]
  The proposed patch touches only arm64 code, which limits the impact to just arm64 systems. There are few ARM64/UEFI systems on the market/supported by Ubuntu, so the risk is quite contained.

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