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Groups > alt.comp.periphs.mainboard.asus > #195

Re: ASUS N550JX - how to turn OFF keyboard backlight

From Paul <nospam@needed.com>
Newsgroups alt.comp.periphs.mainboard.asus, alt.os.linux.ubuntu, comp.sys.laptops
Subject Re: ASUS N550JX - how to turn OFF keyboard backlight
Date 2016-04-24 00:33 -0400
Organization A noiseless patient Spider
Message-ID <nfhi3o$9bs$1@dont-email.me> (permalink)
References (2 earlier) <nfggbj$i2j$1@news.albasani.net> <nfgink$1uf$1@dont-email.me> <nfh6cu$7ke$1@news.albasani.net> <nfh875$ngm$1@gioia.aioe.org> <nfhb5n$gmb$1@news.albasani.net>

Cross-posted to 3 groups.

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Adam wrote:
> "Computer Nerd Kev" <not@telling.you.invalid> wrote in message 
> news:nfh875$ngm$1@gioia.aioe.org...
>> In comp.sys.laptops Adam <adam@no_thanks.com> wrote:
>>> Thanks (Guru Paul), but Fn+F3 acts more like a dimmer and
>>> is not permanent.  I tried that before looking through the BIOS for
>>> a way to disable keyboard backlight permanently.
>>> For aluminum exterior, keyboard backlight is awful.
>> Keyboard backlight settings can sometimes be changed when running
>> Linux from the system settings (I was going to say in the /proc/acpi
>> directory, but things seem to have moved on).
>>
>> Here's a forum thread where an ASUS laptop user wants to disable
>> the keyboard backlight in Ubuntu:
>> http://askubuntu.com/questions/745856/turn-off-keyboard-backlight-asus-laptop-ubuntu-15-10
>>
>> Here's some detailed information for Arch Linux about changing
>> keyboard light brightness on another ASUS laptop:
>> https://wiki.archlinux.org/index.php/ASUS_Zenbook_Prime_UX31A#Keyboard_backlight
>>
>> -- 
>> __          __
>> #_ < |\| |< _#
> 
> 
> Thanks, yes, in linux, there's practically nothing you cannot configure.
> I was hoping for a simple "works for ANY OS" solution after learning 
> about...
> 
> /sys/class/leds/asus::kbd_backlight/
> 
> https://help.ubuntu.com/community/AsusZenbookPrime#Keyboard_functions_.28Brightness.2Cvolume.2C....29 

In that article, is one keyword that stands out - "Powertop".

It's not that PowerTop has a control for the keyboard backlight.
It's that PowerTop is supposed to adjust machines for lowest
power consumption. If you had an OS release that seemed to
burn through a battery rapidly, PowerTop can advise as to
what is going on. My *theory* would be, a keyboard backlight
is a waste of electricity, and it may be detected as such
in the ACPI tables. And perhaps PowerTop can find a way
to turn it off or something - so PowerTop wouldn't
give you graded controls, it potentially might turn
it off.

It's also possible PowerTop cannot see this, unless
the boot option "acpi_osi=" thing was added.

Other than that, you'll need to get your hands dirty, to
get it to work (i.e. next time there is an OS upgrade,
you might have to re-implement whatever fix you end up
using).

    Paul

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Thread

ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 11:23 -0700
  Re: ASUS N550JX - how to turn OFF keyboard backlight jrg <connyank@cox.net> - 2016-04-23 11:39 -0700
    Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 11:53 -0700
      Re: ASUS N550JX - how to turn OFF keyboard backlight Paul <nospam@needed.com> - 2016-04-23 15:37 -0400
        Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 18:09 -0700
          Re: ASUS N550JX - how to turn OFF keyboard backlight not@telling.you.invalid (Computer Nerd Kev) - 2016-04-24 01:40 +0000
            Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 19:31 -0700
              Re: ASUS N550JX - how to turn OFF keyboard backlight Paul <nospam@needed.com> - 2016-04-24 00:33 -0400
                Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 21:59 -0700
                Re: ASUS N550JX - how to turn OFF keyboard backlight Paul <nospam@needed.com> - 2016-04-24 01:38 -0400
                Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 23:13 -0700
                Re: ASUS N550JX - how to turn OFF keyboard backlight not@telling.you.invalid (Computer Nerd Kev) - 2016-04-25 22:48 +0000
                Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-25 17:19 -0700
                Re: ASUS N550JX - how to turn OFF keyboard backlight Paul <nospam@needed.com> - 2016-04-25 20:33 -0400
                Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-25 18:26 -0700
                Re: ASUS N550JX - how to turn OFF keyboard backlight "~misfit~" <shaun.at.pukekohe@gmail.com> - 2016-04-27 16:04 +1200
                Re: ASUS N550JX - how to turn OFF keyboard backlight "Dirk T. Verbeek" <dverbeek@xs4all.nl> - 2016-04-27 08:14 +0200
          Re: ASUS N550JX - how to turn OFF keyboard backlight Chris Ahlstrom <OFeem1987@teleworm.us> - 2016-04-24 08:08 -0400
            Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-24 06:31 -0700
  Re: ASUS N550JX - how to turn OFF keyboard backlight "Dirk T. Verbeek" <dverbeek@xs4all.nl> - 2016-04-23 21:16 +0200
    Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 18:12 -0700
      Re: ASUS N550JX - how to turn OFF keyboard backlight Paul <nospam@needed.com> - 2016-04-23 21:40 -0400
        Re: ASUS N550JX - how to turn OFF keyboard backlight "Adam" <adam@no_thanks.com> - 2016-04-23 19:18 -0700
  Re: ASUS N550JX - how to turn OFF keyboard backlight "Dirk T. Verbeek" <dverbeek@xs4all.nl> - 2016-04-24 19:37 +0200

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