commit a864679083c035eb08a75cf084a6564d589c0b1c
Author: Jason Gerecke <[email protected]>
Date:   Fri Nov 1 11:51:20 2019 -0700

    Add multiple AES stylus definitions

    Adds definitions for many different AES styli. The precise information
    about supported features is hard to come by, but in general most pens
    have two buttons (one of which is treated as an eraser) and can only
    report pressure. A few exceptions are known or suspected and their
    data has been set accordingly.

....

** Patch added: "add-multiple-AES-stylus-definitions.patch"
   
https://bugs.launchpad.net/ubuntu/+source/libwacom/+bug/1921991/+attachment/5482543/+files/add-multiple-AES-stylus-definitions.patch

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https://bugs.launchpad.net/bugs/1921991

Title:
  Support isdv4-aes stylus group and multiple AES stylus definitions

Status in libwacom package in Ubuntu:
  New

Bug description:
  [Impact]

   * There are lots of stylus couldn't be used on Lenovo's platform, our
  OEM customer request to support ThinkPad P15 Gen 1, ThinkPad X1 Yoga
  Gen5, ThinkPad P1 G3.

   * I reviewed and tested the below patches from upstream. It could
  support the stylus very well on P15, P1 or X1 Yoga.

   * a864679 - Add multiple AES stylus definitions 
     I applied into libwacom2 1.3-2ubuntu1, no errors.

   * 8652aa3 - Add isdv4-aes stylus group to all AES sensors
    I tried to apply this patch, but there are not 'data/isdv4-48ca.tablet' and 
'data/isdv4-48ce.tablet', it failed for these two files.

   * ba02abf - Add ISDv4 51e9 (Lenovo ThinkPad P15 Gen 1) (#325)

  [Test Plan]

   * Need your laptop have AES stylus, check the pen setting at gnome-
  control-center when the pen touch the screen. It could not
  set/customize the stylus, such as the second button as right click.

   * After updated the new packages with these patches, you could
  customize the stylus at gnome-control-center.

  [Where problems could occur]

   * It only changes the data/ parts to support more stylus from
  upstream, so it's low risk.

  [Other Info]

   * Related bug:
  https://bugs.launchpad.net/ubuntu/+source/libwacom/+bug/1869059

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