Public bug reported:

Occasionally my touchpad didn't work after booting. So far reboot
helped. Now under Ubuntu 16.04 it just stopped working after reboot. As
far as I can recall I did apt-get upgrade before, so probably there was
something in there. I decided to upgrade to Ubuntu 18.04 and see if it
solves the problem. It doesn't.

- synaptics is installed, but:
$ synclient 
Couldn't find synaptics properties. No synaptics driver loaded?
- touchpad is not detected
$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Sleep Button                              id=8    [slave  keyboard (3)]
    ↳ Video Bus                                 id=9    [slave  keyboard (3)]
    ↳ Power Button                              id=10   [slave  keyboard (3)]
    ↳ HD WebCam: HD WebCam                      id=11   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=14   [slave  keyboard (3)]
- 

$ lsb_release -rd
Description:    Ubuntu 18.04 LTS
Release:        18.04

$ apt-cache policy xserver-xorg-input-synaptics
xserver-xorg-input-synaptics:
  Installed: 1.9.0-1ubuntu1
  Candidate: 1.9.0-1ubuntu1
  Version table:
 *** 1.9.0-1ubuntu1 500
        500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "devices"
   https://bugs.launchpad.net/bugs/1776941/+attachment/5152632/+files/devices

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https://bugs.launchpad.net/bugs/1776941

Title:
  Touchpad not detected on XMG C404 Ubuntu 16.04

Status in linux package in Ubuntu:
  New

Bug description:
  Occasionally my touchpad didn't work after booting. So far reboot
  helped. Now under Ubuntu 16.04 it just stopped working after reboot.
  As far as I can recall I did apt-get upgrade before, so probably there
  was something in there. I decided to upgrade to Ubuntu 18.04 and see
  if it solves the problem. It doesn't.

  - synaptics is installed, but:
  $ synclient 
  Couldn't find synaptics properties. No synaptics driver loaded?
  - touchpad is not detected
  $ xinput list
  ⎡ Virtual core pointer                        id=2    [master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer                      id=4    [slave  pointer 
 (2)]
  ⎣ Virtual core keyboard                       id=3    [master keyboard (2)]
      ↳ Virtual core XTEST keyboard                     id=5    [slave  
keyboard (3)]
      ↳ Power Button                                    id=6    [slave  
keyboard (3)]
      ↳ Video Bus                                       id=7    [slave  
keyboard (3)]
      ↳ Sleep Button                                    id=8    [slave  
keyboard (3)]
      ↳ Video Bus                                       id=9    [slave  
keyboard (3)]
      ↳ Power Button                                    id=10   [slave  
keyboard (3)]
      ↳ HD WebCam: HD WebCam                            id=11   [slave  
keyboard (3)]
      ↳ AT Translated Set 2 keyboard                    id=14   [slave  
keyboard (3)]
  - 

  $ lsb_release -rd
  Description:  Ubuntu 18.04 LTS
  Release:      18.04

  $ apt-cache policy xserver-xorg-input-synaptics
  xserver-xorg-input-synaptics:
    Installed: 1.9.0-1ubuntu1
    Candidate: 1.9.0-1ubuntu1
    Version table:
   *** 1.9.0-1ubuntu1 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status

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