No device specified, trying to scan all of /dev/input/event* In my case the keyboard is associated to input device #0, the evtest program is run by root into a text console or into a terminal:
Use the evtest command line tool (from the omonymous Debian package) to inspect the input events generated by you keyboard. In my case it is input #0:īits ev : (null) (null) (null) (null) (null) Use the lsinput command line tool (from the input-utils Debian package) to discover the input number associated to the keyboard. Inspect the events generated by the keyboard It seems that the LCD (DISPLAYTOGGLE) multimedia function is intercepted by the hardware and it is not handled as an input event nor as an ACPI event by the operating system.
The simplest method is to customize input events using udev and hwdb. It is possibile to customize the ACPI events to reassign the brightness keys to plain function keys, but it is not the preferred way (see ACPI and evemu), because it requires to run an additional sofware layer (the acpid daemon) and the execution of slow action scripts. You can view ACPI events by running acpi_listen (from the acpid Debian package, the acpid service must be started): Pressing the BRIGHTNESSDOWN and BRIGHTNESSUP keys generates ACPI events: this is a different layer than the input subsystem. Unfortunately I was unable to swap the F1/DISPLAYTOGGLE key. The recipe here explained works almost at 100%, both into the textual console and into the X.org graphical environment. I searched a recipe to swap the first function of the key with the secondary one. The primary function of the keys are the multimedia actions, like MUTE, VOLUMEDOWN, VOLUMEUP, PREVIOUSSONG, NEXTSONG, etc. I have a Teclast F6 notebook where the function keys ( F1, F2, … F12) are mapped on the keyboard as secondary: you have to press them together with the Fn key to get the function key. There are two methods for doing this, first method is safe and recommended method but if first method does not work then go for second method which includes modifying the system file and is not preferred.How to swap primary and secondary functions of the Fn key. The procedure is same for other keys as well. The ‘Delete’ key is broken in my laptop so I am going to remap it to ‘Insert’ key.
REMAP KEYBOARD KEYS LINUX WINDOWS
If you want to remap the keys in Windows then you can follow this post. In this post you will learn to remap the keys on Linux using ‘xmodmap’ and ‘xkb’ which are pre-installed on most of the linux distros. Remapping the keys means changing the input behaviour of your keyboard and making it work as we want, not as it was intended. If you are using Linux on MacBook or a key on your keyboard is broken or you have a special key on your keyboard and you want to use it differently than it is designed then you may feel the need to remap the keys of your keyboard.
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