linux-snapdragon: 4.4.0-1089.94 -proposed tracker

Hardware Certification have begun testing this -proposed kernel.

I'm hitting a problem with this kernel when testing the r45 snap. Starting with a clean install, I snap refresh --beta --ignore-validation dragonboard-kernel
It installs fine, but then after rebooting it never becomes available. I reproduced this at home and I see the same problem. Nothing on serial console after "Starting kernel ..."

U-Boot 2016.01-rc1 (Dec 08 2015 - 11:39:05 +0000)
Qualcomm-DragonBoard 410C

DRAM: 986 MiB
MMC: msm_sdhci: 0, msm_sdhci: 1
reading uboot.env
In: serial
Out: serial
Err: serial
Net: Net Initialization Skipped
No ethernet found.
Hit any key to stop autoboot: 0
ENVCMD
Saving Environment to FAT...
writing uboot.env
FAT: Misaligned buffer address (00000000bd0f2860)
done
reading dragonboard-kernel_45.snap/kernel.img
22640128 bytes read in 6184 ms (3.5 MiB/s)
reading dragonboard-kernel_45.snap/dtbs/apq8016-sbc.dtb
66447 bytes read in 40 ms (1.6 MiB/s)
reading dragonboard-kernel_45.snap/initrd.img
5347071 bytes read in 1473 ms (3.5 MiB/s)
## Flattened Device Tree blob at 83000000
   Booting using the fdt blob at 0x83000000
   Using Device Tree in place at 0000000083000000, end 000000008301338e

Starting kernel ...

On classic system, the original kernel is:
Linux dragon410c 4.4.0-1038-snapdragon #42-Ubuntu SMP Thu Nov 24 19:00:08 UTC 2016 aarch64 aarch64 aarch64 GNU/Linux

First, install test kernel with command:
sudo apt-get install linux-snapdragon-headers-4.4.0-1089 linux-image-4.4.0-1089-snapdragon linux-headers-4.4.0-1089-snapdragon linux-snapdragon-tools-4.4.0-1089 linux-tools-4.4.0-1089-snapdragon -y

And then reboot.
It doesn't boot up anymore, nothing shows on monitor, the monitor just keep saying "no signal".

We are seeing issues with the most recent 4.4 Ubuntu kernels on arm64 (bug 1762655).

This bug was fixed in the package linux-snapdragon - 4.4.0-1090.95

---------------
linux-snapdragon (4.4.0-1090.95) xenial; urgency=medium

  * linux-snapdragon: 4.4.0-1090.95 -proposed tracker (LP: #1763689)

  * Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware (LP: #1763644)
    - [Config] arm64: disable BPF_JIT_ALWAYS_ON

  [ Ubuntu: 4.4.0-121.145 ]

  * linux: 4.4.0-121.145 -proposed tracker (LP: #1763687)
  * Ubuntu-4.4.0-120.144 fails to boot on arm64* hardware (LP: #1763644)
    - [Config] arm64: disable BPF_JIT_ALWAYS_ON

linux-snapdragon (4.4.0-1089.94) xenial; urgency=medium

  * linux-snapdragon: 4.4.0-1089.94 -proposed tracker (LP: #1761448)

  [ Ubuntu: 4.4.0-120.144 ]

  * linux: 4.4.0-120.144 -proposed tracker (LP: #1761438)
  * intel-microcode 3.20180312.0 causes lockup at login screen(w/ linux-
    image-4.13.0-37-generic) (LP: #1759920) // CVE-2017-5715 (Spectre v2 Intel)
    - Revert "x86/mm: Only set IBPB when the new thread cannot ptrace current
      thread"
    - x86/speculation: Use Indirect Branch Prediction Barrier in context switch
  * DKMS driver builds fail with: Cannot use CONFIG_STACK_VALIDATION=y, please
    install libelf-dev, libelf-devel or elfutils-libelf-devel (LP: #1760876)
    - [Packaging] include the retpoline extractor in the headers
  * retpoline hints: primary infrastructure and initial hints (LP: #1758856)
    - [Packaging] retpoline-extract: flag *0xNNN(%reg) branches
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool
    - x86/speculation, objtool: Annotate indirect calls/jumps for objtool on 32bit
    - x86/paravirt, objtool: Annotate indirect calls
    - x86/asm: Stop depending on ptrace.h in alternative.h
    - [Packaging] retpoline -- add safe usage hint support
    - [Packaging] retpoline-check -- only report additions
    - [Packaging] retpoline -- widen indirect call/jmp detection
    - [Packaging] retpoline -- elide %rip relative indirections
    - [Packaging] retpoline -- clear hint information from packages
    - SAUCE: modpost: add discard to non-allocatable whitelist
    - KVM: x86: Make indirect calls in emulator speculation safe
    - KVM: VMX: Make indirect call speculation safe
    - x86/boot, objtool: Annotate indirect jump in secondary_startup_64()
    - SAUCE: early/late -- annotate indirect calls in early/late initialisation
      code
    - SAUCE: vga_set_mode -- avoid jump tables
    - [Config] retpoline -- switch to new format
    - [Packaging] final-checks -- remove check for empty retpoline files
  * Xenial update to 4.4.117 stable release (LP: #1756860)
    - IB/mlx4: Fix incorrectly releasing steerable UD QPs when have only ETH ports
    - PM / devfreq: Propagate error from devfreq_add_device()
    - s390: fix handling of -1 in set{,fs}[gu]id16 syscalls
    - ARM: dts: STi: Add gpio polarity for "hdmi,hpd-gpio" property
    - arm: spear600: Add missing interrupt-parent of rtc
    - arm: spear13xx: Fix dmas cells
    - arm: spear13xx: Fix spics gpio controller's warning
    - ALSA: seq: Fix regression by incorrect ioctl_mutex usages
    - KVM/x86: Reduce retpoline performance impact in slot_handle_level_range(),
      by always inlining iter...