My keyboard backlight is not working after software update . I tried different solutions and commands but didnt work .
I tried using commmands
# xset led on
# xset led 3
# xmodmap -e 'add mod3 = Scroll_Lock'
None of the above commands are working .
My laptop specs
Asus UX430UA intel i7 7th gen
Running Cent OS 7
Looking forward for a solution .
Thank You
keyboard backlight is not working after update
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lightman47
- Posts: 1522
- Joined: 2014/05/21 20:16:00
- Location: Central New York, USA
Re: keyboard backlight is not working after update
I experienced exactly this after the 7.6 update with Gnome. Have you checked Settings/Power/keyboard brightness? Mine was set to zero. After setting it to mid-range and reboot, it was again set back to the low end. However, the next adjust and reboot and it worked!
Note: Prior to discovering the above settings I panicked and installed 'system-config-keyboard' and 'system-config-keyboard-base' so I am unable to tell you whether the setting is/isn't contained in those packages.
Note: Prior to discovering the above settings I panicked and installed 'system-config-keyboard' and 'system-config-keyboard-base' so I am unable to tell you whether the setting is/isn't contained in those packages.
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lightman47
- Posts: 1522
- Joined: 2014/05/21 20:16:00
- Location: Central New York, USA
Re: keyboard backlight is not working after update
OK - this has now become a 'problem'.
It seems that my 'settings' don't survive daily shutdown/startups! I have to AGAIN edit the setting mentioned above after only a couple of days.
It seems that my 'settings' don't survive daily shutdown/startups! I have to AGAIN edit the setting mentioned above after only a couple of days.
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lightman47
- Posts: 1522
- Joined: 2014/05/21 20:16:00
- Location: Central New York, USA
Re: keyboard backlight is not working after update
OK - I've been intermittently investigating and I found a one-byte file that controls this. It is /var/lib/systemd/backlight/platform-dell-laptop:leds:dell::kbd_backlight
The content of mine was "0". I noted also that it had been edited last at midnight last night (shutdown time). I then adjusted the backlight through the GUI interface in Settings, as I'd mentioned in a previous post. This turned on the backlight. I refreshed my cli directory listing to find that this file was still un-touched since the shutdown (hmm)! I then waited till the backlight went out and, as root, edited the file manually. I changed the"0" to a "5" and saved the file - the keyboard backlight came on immediately and stayed on for the proper duration.
As it was always unpredictable, I am just going to wait to see if my edit will survive a shutdown/boot. If not, I've already written a quick & dirty script to plug into my startup if needed.
EDIT:
Something in my 'solution' is in error!
The content of mine was "0". I noted also that it had been edited last at midnight last night (shutdown time). I then adjusted the backlight through the GUI interface in Settings, as I'd mentioned in a previous post. This turned on the backlight. I refreshed my cli directory listing to find that this file was still un-touched since the shutdown (hmm)! I then waited till the backlight went out and, as root, edited the file manually. I changed the"0" to a "5" and saved the file - the keyboard backlight came on immediately and stayed on for the proper duration.
As it was always unpredictable, I am just going to wait to see if my edit will survive a shutdown/boot. If not, I've already written a quick & dirty script to plug into my startup if needed.
EDIT:
Something in my 'solution' is in error!