Thinkpad Bluetooth Keyboard II – Driver patch for Linux 5.4

This repo contains my attempts to modify, compile and test
a patch made by @ValdikSS
for the kernel module hid-lenovo to solve weird behaviors of the Thinkpad
Bluetooth Keyboard II in Linux kernel 5.4, compared to 5.10+ (the kernel
version the patch is originally based upon), before migrating to 5.19 (not yet released).

The first version of the external Thinkpad Keyboard (Wired USB) works really
good on Linux, but the second version (Wireless USB/BT) doesn’t work very well
on OS other than Windows. Thanks Lenovo…

I personally have noticed the following unbearable annoyances from day 1
using this keyboard on Linux:

• No horizontal scrolling

  • I really use it while coding, designing and drawing.

• Vertically scrolling with middle button + TrackPoint pastes whatever the
  clipboard is currently holding.

  • Scrolling through files of code is the most annoying thing, the keyboard
    is always pasting things and I find myself undoing those a lot, then
    falling back to mouse + scrollbar (eww!).

• Vertically scrolling triggers a left-click.

  • This causes me to click on things I don’t intend to more often than I can handle.

• The toggle-mic-mute button does not work.

  • A while ago I made a script for the wired version of the keyboard that
    works like a charm
    , but this simply won’t work for the wireless version of the keyboard since the
    keystroke is not recognized neither by the X server nor at ACPI level.

There’s a few more annoyances, although I can bear with those since I don’t use
these features frequently:

• Buttons to toggle Bluetooth (F10) and Wifi (F8, notification center in
  Winbloats) do not work.
• Buttons Tools (F9), and Favorites (F12 ) do not work, but I don’t use them
  at all.

My attempts are logged in shape of weird, maybe broken, commits. I won’t even
clear the history at this point. I want to track my progress.

Will update this README once I solve most of the unbearable annoyances on kernel
5.4

Final steps to apply the (modified) patch in kernel 5.4:

Compile the modified patched module with the also-modified make script:

./make.sh

Backup the unpatched modules

cp /lib/modules/5.4.0-26-generic/kernel/drivers/hid/hid-lenovo.ko hid-lenovo.ko.unpatched

Make patched module the default one

sudo cp -f /lib/modules/5.4.0-26-generic/extra/hid-lenovo.ko /lib/modules/5.4.0-26-generic/kernel/drivers/hid/hid-lenovo.ko

Reload the module

sudo rmmod hid-lenovo && sudo modprobe hid-lenovo

Make the module load automatically:

echo
 -e 
"
\nhid-lenovo
"
 
|
 sudo tee -a /etc/modules-load.d/modules.conf