From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aaron Ma <aaron.ma@canonical.com>
Subject: Re: [PATCH] Revert "Input: trackpoint - add new trackpoint firmware
 ID"
Date: Sun, 31 Dec 2017 16:51:09 +0800
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1, Commit ec667683c53 addes support of the new trackpoint.
The trackpoint can be identified as "TPPS/2 IBM TrackPoint" and set
properties OK. Trackpoint enabled some enhanced features.
Without this commit there will be no scroll mode when xf86-input-evdev
is used.

2, trackpoint.c export a speed of sysfs,
the speed sys file can't be set right value on X1 Carbon 5th. This issue
is caused by trackpoint firmware.
Workaround is to use xinput/xorg/udev/GUI to set trackpoint speed.

3, Windowds tool Trackpointdetect.exe shows it is ELAN (ID:03) in error log.
After debugging psmouse driver on it, the IDs and FW/hardware version is
not ELAN. Forcing to load ELAN driver will not make it work.