Arch Linux

custo

Member

Registered: 2013-11-23

Posts: 64

x220 Intel Backlight with FN key

After a recent system upgrade I can't change my backlight using the FN keys under gnome-shell anymore. Echoing values manually into /sys/class/backlight/intel_backlight/brightness, however, works fine.

I have GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor", which used to work fine.

Last edited by custo (2015-05-03 13:51:43)

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 9,003

Website

Re: x220 Intel Backlight with FN key

I have GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor", which used to work fine.

There are other kernel parameters you can experiment with:
https://wiki.archlinux.org/index.php/Ba … ne_options

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Jin, Jîyan, Azadî

steve___

Member

Registered: 2008-02-24

Posts: 454

Re: x220 Intel Backlight with FN key

Hey custo, were you able to find a solution to this problem?

ScaN0

Member

Registered: 2016-01-20

Posts: 1

Re: x220 Intel Backlight with FN key

GRUB_CMDLINE_LINUX="acpi_osi='!Windows 2012'"

Last edited by ScaN0 (2016-01-20 17:36:01)

steve___

Member

Registered: 2008-02-24

Posts: 454

Re: x220 Intel Backlight with FN key

hey ScaN0, yeah that was working but no longer works with for me with kernel 4.3.3-2-ARCH.

For now I wrote a little script to handle it.

Do you have and x220?  Is it working for you?  Which kernel are you using?

Last edited by steve___ (2016-01-20 17:45:47)