Found something for same motherboard but different OEM:

commit 2e2679a168fe1a0a9089e4e401d6a51b26c4f557
Author: Marcos Paulo de Souza <marcos.souza....@gmail.com>
Date:   Sun Dec 18 15:26:12 2016 -0800

    Input: i8042 - add Pegatron touchpad to noloop table
    
    commit 41c567a5d7d1a986763e58c3394782813c3bcb03 upstream.
    
    Avoid AUX loopback in Pegatron C15B touchpad, so input subsystem is able
    to recognize a Synaptics touchpad in the AUX port.
    
    Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=93791
    (Touchpad is not detected on DNS 0801480 notebook (PEGATRON C15B))
    
    Suggested-by: Dmitry Torokhov <dmitry.torok...@gmail.com>
    Signed-off-by: Marcos Paulo de Souza <marcos.souza....@gmail.com>
    Signed-off-by: Dmitry Torokhov <dmitry.torok...@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

______
Following that bug report (93791), I tried adding i8042.noloop=1 to boo options 
and that *DOES* fix the problem.    Perhaps this laptop needs same patch as the 
other pegatron?

Thanks!

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https://bugs.launchpad.net/bugs/1906128

Title:
  Touchpad not deteced on Bytespeed C15B laptop

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