I'm one of the authors for the patch used above and wanted to highlight
that there was a bug in it that broke the existing keyboard support. It
was later fixed in the kernel with commit
c8b1b3dd89ea7b3f77a73e59c4c4495e16338e15. I've attached this as a patch
(fix_keyboard.patch). This patch is required for the previous keyboard
functionality to work again.

Unfortunately I don't have the hardware to test any proposed kernel (or
to provide any logs) but I wanted to bring this bug to your attention.

There was also another issue that could occur during startup with these
I2C Touchpad devices. This issue was fixed in commit
a89af4abdf9b353cdd6f61afc0eaaac403304873. This commit is required for
reliable Touchpad functionality.

Both these commits are in v4.10 of the Kernel (thus in Ubuntu 17.04).

** Patch added: "fix_keyboard.patch"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1650895/+attachment/4863405/+files/fix_keyboard.patch

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https://bugs.launchpad.net/bugs/1650895

Title:
  Several new Asus laptops are missing touchpad support

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  E502SA and several other new Asus laptops are missing touchpad
  support.

  Support for the Asus touchpad has been introduced only recently:

  http://www.spinics.net/lists/linux-input/msg48143.html

  From the development kernel git:

  "commit 9ce12d8be12c94334634dd57050444910415e45f
  Author: Brendan McGrath <red...@redmandi.dyndns.org>
  Date:   Tue Nov 29 18:59:25 2016 +1100

      HID: asus: Add i2c touchpad support
      
      Update the hid-asus module to add multitouch support for the Asus i2c 
touchpad.
      
      This patch aims to resolve the issue raised here:E
      https://bugzilla.kernel.org/show_bug.

  The latest mainline kernel, Linux 4.9 that was released 11th of
  December doesn't contain this patch.

  I was able to get touchpad features to work with E502SA after patching
  Xenial Xerus kernel with the above patch and the patches it depends
  on.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-53-generic 4.4.0-53.74
  ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
  Uname: Linux 4.4.0-53-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jamse      2045 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Dec 18 15:41:30 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=d46d5e40-bd0f-41a5-87bb-f4f470f7b4d6
  InstallationDate: Installed on 2016-12-14 (4 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 04f2:b52b Chicony Electronics Co., Ltd 
   Bus 001 Device 004: ID 13d3:3423 IMC Networks 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. E502SA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-53-generic.efi.signed 
root=UUID=17457b58-fc63-470b-a916-2eedb0dbd58e ro quiet splash 
intel_idle.max_cstate=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-53-generic N/A
   linux-backports-modules-4.4.0-53-generic  N/A
   linux-firmware                            1.157.6
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/20/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: E502SA.300
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: E502SA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrE502SA.300:bd07/20/2016:svnASUSTeKCOMPUTERINC.:pnE502SA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnE502SA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: E502SA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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