Mikhail Khvainitski
62d21f9df4
[ Upstream commit46a0a2c96f] Built-in firmware of cptkbd handles scrolling by itself (when middle button is pressed) but with issues: it does not support horizontal and hi-res scrolling and upon middle button release it sends middle button click even if there was a scrolling event. Commit3cb5ff0220("HID: lenovo: Hide middle-button press until release") workarounds last issue but it's impossible to workaround scrolling-related issues without firmware modification. Likely, Dennis Schneider has reverse engineered the firmware and provided an instruction on how to patch it [1]. However, aforementioned workaround prevents userspace (libinput) from knowing exact moment when middle button has been pressed down and performing "On-Button scrolling". This commit detects correctly-behaving patched firmware if cursor movement events has been received during middle button being pressed and stops applying workaround for this device. Link: https://hohlerde.org/rauch/en/elektronik/projekte/tpkbd-fix/ [1] Signed-off-by: Mikhail Khvainitski <me@khvoinitsky.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.