Oh I see... probably mine is a different problem (attached updated output of 
dmesg).
I thought the following error could be related to the issue:

amd_gpio AMDI0030:00: Failed to get gpio IRQ: -22


** Attachment added: "dmesg.txt"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1609601/+attachment/5054229/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1609601

Title:
  i2c_hid: probe of i2c-ELAN0732:00 failed with error -61

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I'm using an HP Envy x360 M6-ar004dx with an AMD 7th-gen FX APU, and
  the touchscreen will not work. Dmesg shows i2c_hid reporting multiple
  "failed to reset device" error messages before finally failing to add
  it as an HID device with error -61. As far as I can tell, it's being
  detected as an ELAN touchscreen. I've seen reports that this error can
  be fixed in newer kernels, as the touchscreen uses GPIO interrupts
  which are fixed in versions 4.6 and later. Most of the information I
  can find indicates that 4.7 includes improved AMD support, but the
  mainline kernel build appears to be missing the AMD GPIO drivers,
  since I get a "failed to get GPIO interrupt" error. I've compiled my
  own 4.7 kernel from the mainline GIT, including the patches used in
  kernel-ppa/mainline and setting the right config flags for AMD GPIO,
  but that just gets me the same errors I'm seeing in 4.4.0-31-generic.
  For additional info, I'm attaching my dmesg output in its entirety.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-31-generic 4.4.0-31.50 [modified: 
boot/vmlinuz-4.4.0-31-generic]
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  colin      3591 F.... pulseaudio
   /dev/snd/controlC0:  colin      3591 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Wed Aug  3 21:51:47 2016
  HibernationDevice: RESUME=UUID=1875834b-d1ff-4b97-a9b8-44afb056c592
  InstallationDate: Installed on 2016-08-03 (0 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160720)
  MachineType: HP HP ENVY x360 m6 Convertible
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-31-generic.efi.signed 
root=/dev/mapper/ubuntu--gnome--vg-root ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-31-generic N/A
   linux-backports-modules-4.4.0-31-generic  N/A
   linux-firmware                            1.157.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/29/2016
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.10
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 81AA
  dmi.board.vendor: HP
  dmi.board.version: 59.42
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsyde:bvrF.10:bd06/29/2016:svnHP:pnHPENVYx360m6Convertible:pvrType1ProductConfigId:rvnHP:rn81AA:rvr59.42:cvnHP:ct10:cvrChassisVersion:
  dmi.product.name: HP ENVY x360 m6 Convertible
  dmi.product.version: Type1ProductConfigId
  dmi.sys.vendor: HP

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