[SOLVED]Keyboard backlight not working in Mageia 9

[fredk]

Keyboard backlight not working in Mageia 9
===============================================
New keyboard in use which has a backlight with all keys.
The backlight can be turned on or off with the 'scroll Lock key, but turns on automatically when starting Windows.
However with Mageia when starting the PC., I can turn on the backlighting, but as soon as Mageia gets started it turns automatically off and I can't turn it on thereafter.

Is such use of keyboad/key backlighting supported in Mageia, and if so, how to possibly/potentially activate it..?

The keyboard type is SBK-251U-BK from Smartbuy.

Thanks in advance,

[microchip]

Which desktop environment? If KDE, it can be set to turn it on after login. No idea how you do that during boot process

[doktor5000]

Hi there, can you check if it exposes any brightness setting?
Please also post the product/vendor IDs.

Code: Select all

brightnessctl -l
lsusb

[fredk]

Which desktop environment? If KDE, it can be set to turn it on after login. No idea how you do that during boot process

The environment is Plasma....

[fredk]

Hi there, can you check if it exposes any brightness setting?
Please also post the product/vendor IDs.

Code: Select all

brightnessctl -l
lsusb

The product/vendor IDs = The keyboard type is SBK-251U-BK from Smartbuy (vendor)

will post the requested code output a bit later...

[isadora]

Output as follows:

Code: Select all

fred@localhost ~]$ su
Password:
[root@localhost fred]#
[root@localhost fred]# brightnessctl -l
lsusb
bash: brightnessctl: command not found
Bus 004 Device 003: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 004: ID 0461:4d0f Primax Electronics, Ltd HP Optical Mouse
Bus 002 Device 003: ID 2a7a:9597  CASUE USB KB
Bus 002 Device 002: ID 0557:7000 ATEN International Co., Ltd Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
[root@localhost fred]#

[fredk]

As to the keyboard - bought it cheap here in Russia in a supermarket as I needed a keyboard with Russian caracters.
Smartbuy seems some megastore when searching on line - and eventhough shown as the vendor,
it will be not the original manufacturer - nut no clue as no indications to produces the keyboard...

[doktor5000]

The product/vendor IDs = The keyboard type is SBK-251U-BK from Smartbuy (vendor)

Nope, those are the vendor/product IDs, from the lsusb output

2a7a:9597

Didn't find anything about your particular keyboard, but there are some solutions for keyboards where scroll lock is used to turn on backlights:
https://unix.stackexchange.com/question ... y-keyboard

[fredk]

Thanks - have looked at the link and scripts, but slightly confused now...
This keyboard indeed uses the scrollkey for on or of setting of the background leds - clicking it once is either on or off.
Are these scripts meant as final solution..ie. hit scrollkey is either backlit leds out or on - or a solution per session..?
In case of a ''permanent'' solution what to copy/paste where..?

[doktor5000]

Are these scripts meant as final solution..ie. hit scrollkey is either backlit leds out or on - or a solution per session..?

They mostly add a toggle for scroll lock key per session.

Although this enables it on every boot: https://unix.stackexchange.com/a/337299/83329

[fredk]

Sorry for not coming back earlier - got caught in vaious issues...
Have tried the several scripts, but what only seems to work are the following command lines:
set led named "Scroll Lock" // xset -led named "Scroll Lock" - when typed into the command window (note: the scrolllock buttion itself does nothing)
So I can either use the manual solution as per above - ot automate it in for example a keyboard short cut using key combinations...
Concerning the last option any ideas how to do this easely without going to deep into the OS structure..?
Thanks

[doktor5000]

After defining the shortcut to some button you can use something like xdotool to simulate that button press. See e.g. https://superuser.com/a/585415/365864

[fredk]

Thanks downloaded and installed:[fred@localhost ~]$ xdotool --version = xdotool version 3.20211022.1

Now trying to understand how to use it as there's no direct explanation I could find on adding a command string to a keyboard short cut I would like to impement, like:

xdotool key ctrl+l for using xset led named "Scroll Lock" (backlit on)
and
xdotool key ctrl+o for using xset -led named "Scroll Lock" (backlit off)

Any sugestion on how the correct command using xdotool should look like.?

[doktor5000]

xdotool is used for sending button presses, not for defining keyboard shortcuts or rebinding keys.
Also the link above directly links to the man page for xdotool which basically explains everything there is about xdotool: https://manpages.ubuntu.com/manpages/tr ... ool.1.html

[fredk]

Finally some feedback from my side:
FYI. the several suggested solutions didn't work...
But was able to use the 2 scripts as mentioned earlier through Magaia's built-in solution to create keyboard-customized shortcuts,
and assign a key combination for respectivy backlit on or off.
So for now case closed and thanks for the provided sugions.

[doktor5000]

Please don't forget to mark the thread as solved, by editing the subject of the first post and prefix it with [SOLVED], thanks in advance.