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Groups > alt.comp.periphs.mainboard.asus > #196

Re: ASUS N550JX - how to turn OFF keyboard backlight

From "Adam" <adam@no_thanks.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 2016-04-23 21:59 -0700
Organization albasani.net
Message-ID <nfhjs8$4bo$1@news.albasani.net> (permalink)
References (3 earlier) <nfgink$1uf$1@dont-email.me> <nfh6cu$7ke$1@news.albasani.net> <nfh875$ngm$1@gioia.aioe.org> <nfhb5n$gmb$1@news.albasani.net> <nfhi3o$9bs$1@dont-email.me>

Cross-posted to 3 groups.

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"Paul" <nospam@needed.com> wrote in message 
news:nfhi3o$9bs$1@dont-email.me...
> Adam wrote:
>> "Computer Nerd Kev" <not@telling.you.invalid> wrote in message 
>> news:nfh875$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.

Aren't LEDs very-very low power?

Couldn't some nice BIOS engineer just add an option to disable keyboard 
backlight?    :-)


>
> 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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