title: How do I discover the ACPI id for a laptop touchpad in Linux?
body: <p>How do I get the device ID for my touchpad in Linux? The device doesn't show up in <code>lspci</code>, <code>lsusb</code>, or <code>cat /proc/bus/input/devices</code>. For example, this patch adds the ID "ELAN0608": <a href="https://lkml.org/lkml/2017/8/10/145" rel="noreferrer">https://lkml.org/lkml/2017/8/10/145</a></p>
  
  <p>I have a similar touchpad but I'm not sure what the ID is - it may need a change in the kernel. How do kernel developers go about querying info like this?</p>