[Bug 1778087] Re: ELAN1200 touchpad jumps around and disconnects

The result in my previous comment was obtained with kernel parameter
"i2c-hid.debug=1"

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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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