Hello Jim, or anyone else affected,

Accepted flash-kernel into xenial-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/flash-
kernel/3.0~rc.4ubuntu62.2 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 on 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/1384955

Title:
  support compressed kernels on arm64

Status in debian-installer package in Ubuntu:
  Fix Released
Status in flash-kernel package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux-hwe-edge package in Ubuntu:
  New
Status in debian-installer source package in Xenial:
  Fix Committed
Status in flash-kernel source package in Xenial:
  Fix Committed
Status in linux-hwe-edge source package in Xenial:
  New
Status in flash-kernel package in Debian:
  New

Bug description:
  [Impact]
  Ubuntu kernels >= hwe-y (4.8) will no longer boot on xgene/uboot systems. The 
image size appears to have outgrown the defined firmware region, and u-boot 
will error out with a checksum mismatch error. A solution for this is to start 
shipping a compressed kernel (Image.gz target). flash-kernel needs updating to 
detect a compressed kernel and set the appropriate uImage compression flag. 
Similarly, d-i needs updating because it does it's own uImage generation.

  [Test Case]
  Boot an hwe-y kernel on an xgene/uboot system (APM Mustang, HP ProLiant m400).

  [Regression Risk]
  The necessary code is in place and in-use for yakkety, and no issues have 
been discovered there. The SRU involves clean cherry-picks of that code for d-i 
& f-k. The kernel side needs to be modified to pull in the correct version of 
flash-kernel for xenial.

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