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These two keys are found on some models with dual display. - 0x6a is intended for controlling the secondary screen brightness. - 0x4b is intended for toggling the arrow keys between arrows and page up / page down. This key is found on a slightly modified keyboard layout. - 0xc7 is intended to cycle through keybvoard brightnesses (upwards) but there is not suitable existing code for this behaviour. Using `KEY_KBDILLUMTOGGLE` is different behaviour to Windows but at least is picked up by many desktops already. Signed-off-by: Luke D. Jones <luke@ljones.dev> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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.