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Backlight and Keyboard Brightness Integration
Linux makes adjusting brightness parameters on a laptop's screen and keyboard available via a virtual directly.
These directories can always be located within /sys/class/[backlight|leds]
However, you typically need to be root to adjust these.
Way-Shell interfaces with Systemd's Logind service which can act as a root proxy for adjusting the brightness files found in these virtual directories.
Your laptop's screen brightness file is usually discoverable inside the directory /sys/class/backlight/{vendor_specific} where {vendor_specific} may change depending on your laptop.
For instance, on my Lenovo X1 Carbon the vendor specific directory is intel_backlight.
Here is a directory listing to get your bearings.
ls /sys/class/backlight/intel_backlight
actual_brightness bl_power brightness device max_brightness power scale subsystem type uevent
Way-Shell always assumes that backlight files can be found at the prefix /sys/class/backlight.
Therefore, a dconf configuration exists which simply asks for the vendor specific directory and providing this will enable brightness integration.
The dconf key can be found at /org/ldelossa/way-shell/system/backlight-directory and the value is the vendor specific directory as a string.
dconf read /org/ldelossa/way-shell/system/backlight-directory
'intel_backlight'
Most of what is said above is mirrored for keyboard backlights, however the directory changes a bit.
You can find your keyboard backlight brightness files in /sys/class/leds/{vendor_specific}
Here is a directory listing to get your bearings.
ls /sys/class/leds/tpacpi::kbd_backlight
brightness brightness_hw_changed device max_brightness power subsystem trigger uevent
Likewise, a dconf key exists for providing the vendor specific keyboard backlight directory to Way-Shell.
dconf read /org/ldelossa/way-shell/system/keyboard-backlight-directory
'tpacpi::kbd_backlight'