Arch Linux

m1st3rkr3p

Member

Registered: 2014-02-21

Posts: 34

[fixed][kernel] fn keys stopped working after installing kernel 3.13.4

Hello,
today I have upgraded to the 3.13.4 kernel and the FN keys that set the screen brightness stopped working. When i change the brightness on the gnome menu works fine.
I'm new with arch, I've checked on the wiki and the fixes acpi_osi=Linux acpi_backlight=vendor aren't working.
Someone else got this problem??

Last edited by m1st3rkr3p (2014-02-21 22:50:59)

m1st3rkr3p

Member

Registered: 2014-02-21

Posts: 34

Re: [fixed][kernel] fn keys stopped working after installing kernel 3.13.4

got it fixed with

video.use_native_backlight=1

sorry for the post

monkey--boy

Member

Registered: 2014-02-24

Posts: 2

Re: [fixed][kernel] fn keys stopped working after installing kernel 3.13.4

Hi there,

I'm new in this forum and was always able to solve any problems by finding the solution in this forum, but now I'm sticking with this and nothing helps.

To add acpi_osi=Linux acpi_backlight=vendor to the command line some months ago was very useful until I installed kernel 3.13.5-1. I was trying a lot of different solution from other forum today but nothing solved it.
I tried for example:

acpi_osi="!Windows 2012"
acpi_osi="Windows 2009"
acpi_osi=Linux

in combination with

acpi_backlight=vendor
acpi_backlight=video

and surely video.use_native_backlight=1

I'm using a ThinkPad Edge E330.

Thank you in advance and all apologies for reopening this thread.

m1st3rkr3p

Member

Registered: 2014-02-21

Posts: 34

Re: [fixed][kernel] fn keys stopped working after installing kernel 3.13.4

Hi there,

I'm new in this forum and was always able to solve any problems by finding the solution in this forum, but now I'm sticking with this and nothing helps.

To add acpi_osi=Linux acpi_backlight=vendor to the command line some months ago was very useful until I installed kernel 3.13.5-1. I was trying a lot of different solution from other forum today but nothing solved it.
I tried for example:

acpi_osi="!Windows 2012"
acpi_osi="Windows 2009"
acpi_osi=Linux

in combination with

acpi_backlight=vendor
acpi_backlight=video

and surely video.use_native_backlight=1

I'm using a ThinkPad Edge E330.

Thank you in advance and all apologies for reopening this thread.

Hello,
after I added the video.use_native_backlight=1 to the kernel I was forced to update grub. Because if you just add that and you don't update the grub it's not working have you updated grub after every try???

Last edited by m1st3rkr3p (2014-02-24 17:26:06)

WonderWoofy

Member

From: Los Gatos, CA

Registered: 2012-05-19

Posts: 8,414

Re: [fixed][kernel] fn keys stopped working after installing kernel 3.13.4

Instead of updating grub on every try, it might be easier to simply write down all these various options and then just edit the kernel command line from the grub menu itself.  That way you aren't regenerating the grub.cfg over and over and over again.

monkey--boy

Member

Registered: 2014-02-24

Posts: 2

Re: [fixed][kernel] fn keys stopped working after installing kernel 3.13.4

Hi m1st3rkr3p,

thanks for your help, but I'm not using Grub. It is an UEFI system and I'm booting the kernel direcly as UEFI application.
I found a solution which is working verry well for me. The following snippet is telling X how to handle the backlight.

This should be placed inside a config file if X, e.g. /etc/X11/xorg.conf.d/30-screen.conf:

Section "Device"
        Identifier "Screen"
        Option "Backlight" "intel_backlight"
EndSection

Advantage: backlight changing works well with an on screen display, which I've never had before.
Disadvantage: backlight changing is not possible anymore on command line without starting X.

Best regards
monkey--boy