This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1778534

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1778534

Title:
  Touchpad not working (Elantech ELAN0618)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  For a fresh installed Ubuntu 16 (and 18), touchpad doesn't work for
  Elantech ELAN0618.

  We have modified the struct elan_acpi_id, by adding ELAN0618 to the
  list of the supported models (in the file
  drivers/input/mouse/elan_i2c_core.c from the kernel source)

  static const struct acpi_device_id elan_acpi_id[] = {
        { "ELAN0000", 0 },
        { "ELAN0100", 0 },
        { "ELAN0600", 0 },
        { "ELAN0602", 0 },
        { "ELAN0605", 0 },
        { "ELAN0608", 0 },
        { "ELAN0605", 0 },
        { "ELAN0609", 0 },
        { "ELAN060B", 0 },
        { "ELAN060C", 0 },
        { "ELAN0611", 0 },
        { "ELAN0618", 0 },
        { "ELAN1000", 0 },
        { }
  };

  and then built the kernel, and our problem solved.

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