Laptop Background light

Desktop Environments Plasma
1

Hi everyone
Im not sure this is the right section for my post.
I Have Laptop Huawei MateBook 13 , this OS working perfect on it but after last install on February i dont have backround light on my keyboard or is turn on sometime when i close and open the screen.
Do you have idea how to fix it

2

Probably not. This is the German section of the forum.

3

Omurtak

1h

Hi everyone
Im not sure this is the right section for my post.
I Have Laptop Huawei MateBook 13 , this OS working perfect on it but after last install on February i dont have backround light on my keyboard or is turn on sometime when i close and open the screen.
Do you have idea how to fix it

4

if you are on X11 ,not wayland , a temporary fix is to type in terminal

xset led on

and

xset led off

to switch on and off.

there is a way to make this permanent when you log in (some bash script at login) , but i can’t remember how .

5

https://forum.endeavouros.com/t/laptop-no-keyboard-backgtount-light/70723/3?u=3nd

6

Another temporary workaround:

yay -S brightnessctl
brightnessctl --list

find your device
as an example (my keyboard has no backlight)

Device 'input3::capslock' of class 'leds':
        Current brightness: 0 (0%)
        Max brightness: 1

brightnessctl --device='input3::capslock' set 1

Further info here

7

thanks but have any option to make it autostart because i don’t know how to add it

8

If you use Plasma create a script like kbd_blon.sh in your home:

#!/bin/sh
brightnessctl --device='input3::capslock' set 1

NB. your device will be different.
chmod +x kbd_blon.sh # to enable execution
and press Super, type Autostart, Add new Login script and select the above script.

1 Like
9

i have tried this way , but i get this output

Available devices:
Device 'acpi_video0' of class 'backlight':
	Current brightness: 7 (100%)
	Max brightness: 7

Device 'input4::capslock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input4::scrolllock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input5::capslock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input4::numlock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1

Device 'input5::scrolllock' of class 'leds':
	Current brightness: 0 (0%)
	Max brightness: 1

Device 'input5::numlock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1

how do i know which device is my keyboard ?

PS: i have a laptop that keyboard doesn’t work so i’m using an external keyboard that i want the backlight on

edit : have now tried both device 4 and 5 , keyboard light doesn’t come on ?

[jp@jp14 ~]$ brightnessctl --device='input4::capslock' set 1
Updated device 'input4::capslock':
Device 'input4::capslock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1

[jp@jp14 ~]$ brightnessctl --device='input5::capslock' set 1
Updated device 'input5::capslock':
Device 'input5::capslock' of class 'leds':
	Current brightness: 1 (100%)
	Max brightness: 1
10

lsusb
and show us the Keyboard part of the output.

BTW Have you tried Fn + PgUp and Fn + PgDn to increase and decrease the brightness?

11

Bus 001 Device 002: ID 1a2c:2c27 China Resource Semico Co., Ltd USB Keyboard

the external doesn’t have a FN key. And i don’t want to increase/decrease brightness, i just want it on ( i can get it on/off my way , just thought i’ll give your way a try)

12

How about this command?

xset led on
13

That’s what I gave the OP at beginning of this thread.

14

My apologies. ‘It’s a long way to Tipperary…’
F5 perhaps?