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#1 2019-03-19 15:27:20

dartheian
Member
Registered: 2019-03-19
Posts: 12

[SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

Hello everyone,

I'm setting up a fresh installation of Arch linux on a Santech T75 (Clevo p640hk1/p641hk1, dunno wich one). I managed to get almost all function keys working but the brightness control ones.

When I press Fn + F8 or Fn + F9 nor 'xev', 'acpi_listen' or 'showkey -k' show a message.

Does someone have similar problems or know how to fix this?

Thanks in advance!

Edit: Intel 7700HQ + Nvidia 1050Ti with Nvidia Optimum

Edit2: Works with fresh install without xf86-video-intel package. Could be a xf86-video-intel problem?

Last edited by dartheian (2020-01-16 14:19:55)

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#2 2019-03-19 19:37:15

Head_on_a_Stick
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From: London
Registered: 2014-02-20
Posts: 7,680
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Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

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#3 2019-03-19 20:04:10

dartheian
Member
Registered: 2019-03-19
Posts: 12

Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

Thanks for the reply. I already found the wiki page about backlight and I managed to get 'xbacklight' work. Now I'm able to adjust the screen brightness fron the terminal invoking 'xbacklight'.

The problem is that, unfortunately, I can't bind 'xbacklight' commands to my screen brightness function keys, since no signal is raised when I press those keys.
I can't understand why those buttons are not captured by neither 'xev', 'acpi_listen' or 'showkey -k'.

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#4 2019-03-19 20:09:01

Head_on_a_Stick
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From: London
Registered: 2014-02-20
Posts: 7,680
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Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

dartheian wrote:

I already found the wiki page about backlight

If you had mentioned that in the OP then I wouldn't have wasted my time posting the link.

Have you tried the kernel command line options? One of those might activate the hardware keys.

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#5 2019-03-19 20:24:53

dartheian
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Registered: 2019-03-19
Posts: 12

Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

Head_on_a_Stick wrote:

Have you tried the kernel command line options? One of those might activate the hardware keys.

Yes, none of the four works.

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#6 2019-03-19 20:31:30

Head_on_a_Stick
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From: London
Registered: 2014-02-20
Posts: 7,680
Website

Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

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#7 2019-03-20 13:39:20

dartheian
Member
Registered: 2019-03-19
Posts: 12

Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

Unfortunately also this fix does not work, moreover I need 'acpi_osi=!' and 'acpi_osi=Windows_2009' among my kernel parameters.

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#8 2019-05-21 12:01:26

dartheian
Member
Registered: 2019-03-19
Posts: 12

Re: [SOLVED] Brightness keys don't work on Clevo p640hk1/p641hk1

I did a fresh install and now the keys seems to work out of the box. I really don't know wich could be the cause of the original problem, the only thing I can think of is that this time I didn't install the xf86-video-intel package ( https://www.archlinux.org/packages/extr … deo-intel/ ).

EDIT: Following the Backlight wiki page (https://wiki.archlinux.org/index.php/Backlight) everything seems to work properly. I created the configuration file (/etc/X11/xorg.conf.d/20-intel.conf), trying out various parameters. Then I installed the xf86-video-intel package for 2D acceleration, and it still works.

Last edited by dartheian (2019-11-24 23:11:54)

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