Add support for Lenovo Thinkpad X1 Tablet Gen3 trackpoint and buttons
sudo apt-get install build-essential libelf-dev linux-headers-`uname -r`
cd linux-5.4.66
make
# next step will fail if you have secure boot enabled in BIOS as this module will not be signed
make insmod
# XXX: only do this if you can live without Secure Boot (...) or learn how to sign kernel modules
make install
Patch was submitted to linux kernel on 9 feb 2019.
https://www.spinics.net/lists/linux-input/msg60060.html
Was included in 5.1
After hid refactoring in early 5.x, this patch stoped to work.
New patch was submitted to on 19 sep 2020.
It will hopefully be included in 5.10