Hello all

The same happens to my laptop that I've bought a week ago (Asus FX503VM,
GTX1060).

I had already seen that the touchpad had issues with the default 4.15
kernel on Ubuntu 18.04 that I have installed. Therefore I have installed
Ukuu and managed to load later kernels.

Indeed running 4.17.11 had the touchpad working perfectly (no stuttering
and lag), but unfortunately with the freezing problem mentioned here,
present.

After some experimenting with the modules, I have realised that
unloading and loading the i2c_hid module fixes the freeze. After the
last post pointing at bugzilla for Fedora, I can verify that unloading
and loading the i2c_hid module fixes the problem which is also caused by
a five finger tap as stated there (for me it is sometimes caused even
during the two finger scroll).

I've now updated the kernel to 4.17.12 but the problem persists and no
fix seems to be incorporated. IMHO, the problem is at the i2c_hid
module. Let's hope that this will be fixed soon.

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https://bugs.launchpad.net/bugs/1778087

Title:
  ELAN1200 touchpad jumps around and disconnects

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is on an ASUS GL503VD laptop and would probably affect other ASUS
  laptops equipped with the ELAN1200 touchpad.

  I am on Kernel 4.17.2 because older kernels did not enable the
  touchpad at all(It was just unrecognized or i2c-hid stopped the
  computer from booting)

  The touchpad works but it has erratic behaviour and disconnects
  randomly. After it disconnects the only way to bring it back is to
  `modprobe -r hid-multitouch && modprobe hid-multitouch`

  Libinput and synaptics can handle the touchpad though I found
  synaptics to be more stable.

  dmesg gets spammed with this whenever I move the touchpad:
  [timestamp] i2c_hid i2c-ELAN1200:00: i2c_hid_get_input: incomplete report 
(16/65535)

  I tried to compile: https://github.com/mishurov/linux_elan1200_touchpad
  Because from what I understand the "jumpy/disconnect" problem is associated 
to the incomplete reports and Mishurov managed to mitigate those. Unfortunately 
some symbols were deprecated in kernel 4.17.2 and it did not compile for my 
system.

  While I can use my touchpad as is right now, and "restart" it with
  modprobe when needed, it would be nice to have it function bug-free.
  (Right after I typed this my touchpad disconnected and I needed to
  modprobe again, I am considering making a cronjob for that)

  Let me know if anything else is needed. Will wait for an apport collection to 
add log files.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  DistroRelease: Ubuntu 18.04
  InstallationDate: Installed on 2018-06-10 (11 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: linux (not installed)
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  Tags:  bionic
  Uname: Linux 4.17.2 x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True

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