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#1 2016-05-09 08:18:59

DocTia
Member
Registered: 2016-05-09
Posts: 2

brightness fn key on asus P2520LA-XO0281D

Hi! I've just buy this new laptop and I've installed arch. It's almost all ok but I have a problem with the brightness fn key. From the Plasma system settings I can change the brightness but when I use fn keys it seems that I don't touch anything sad Looking for answer on google I've found some answer but none has worked for me.

I have tryed to:

- Install ACPI and ACPID
- Add some line in /boot/loader/entries/arch.conf

title   Arch Linux
linux   /vmlinuz-linux
initrd  /initramfs-linux.img acpi_backlight=vendor
options root=PARTUUID=6a6996d9-157e-447c-9c53-3520ac54c270 rw

- Create a file named 20-intel.conf:

Section "Device"
     Identifier  "card0"
     Driver      "intel"
     Option      "Backlight"  "intel_backlight"
     BusID       "PCI:0:2:0"
EndSection


What else can I try?

Last edited by DocTia (2016-05-09 09:03:24)

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#2 2016-05-09 22:22:13

The Loko
Member
From: Spain
Registered: 2014-07-23
Posts: 100

Re: brightness fn key on asus P2520LA-XO0281D

It's a known bug in the kernel, it happens with all the newest asus laptops. There are some bug reports like this one: https://bugzilla.kernel.org/show_bug.cgi?id=98931

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#3 2016-05-10 07:12:01

Head_on_a_Stick
Member
From: London
Registered: 2014-02-20
Posts: 7,679
Website

Re: brightness fn key on asus P2520LA-XO0281D

DocTia wrote:

initrd  /initramfs-linux.img acpi_backlight=vendor

The parameters are supposed to be added to the "options" line, after "rw" wink

You can also try the other parameters listed here:
https://wiki.archlinux.org/index.php/Ba … ne_options

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#4 2016-05-10 07:48:43

DocTia
Member
Registered: 2016-05-09
Posts: 2

Re: brightness fn key on asus P2520LA-XO0281D

Head_on_a_Stick wrote:

The parameters are supposed to be added to the "options" line, after "rw" wink

You can also try the other parameters listed here:
https://wiki.archlinux.org/index.php/Ba … ne_options

I already tryed all the parameter indicated there, both in the options line and in the initrd line but noting of them works sad

The Loko wrote:

It's a known bug in the kernel, it happens with all the newest asus laptops.

I've read all the comments, I've seen that there is a patch but I don't know how to apply it, so I'm going with a classical new shortcuts with another two keys. Thanks anyway!

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