Arch Linux

mubster

Member

Registered: 2015-12-23

Posts: 8

ASUS UX303LB - Display Backlight keyboard shortcut's not working

I have an ASUS UX303LB (Broadwell with Geforce 940m) and cannot for the life of me get the fn-f5 / fn-f6 shortcuts to raise and lower display backlight to work
I have tried basically anything you can find in the top 3 pages of google searches.

before I'm asked

GRUB_CMDLINE_LINUX_DEFAULT="quiet apci_osi="

or

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

in /etc/default/grub does not work

or adding

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

to /usr/share/X11/xorg.conf.d/20-backlight.conf

any ideas?

warmos

Member

Registered: 2014-11-18

Posts: 20

Re: ASUS UX303LB - Display Backlight keyboard shortcut's not working

Asus N56VV here
Few questions:
- Does the kbd backlight normally work? I mean what is in the /sys/class/leds and /sys/devices/platform/asus-nb-wmi/leds?
- Is asus-nb-wmi module loaded?

Maybe you have same problem as me: the kbd backlight keys does not work because kbd backlight does not get recognised by system at all from kernel 3.9 or 3.8
But that's absolute shot in the dark... You have absolutely different model.

Sorry, my mistake, I've read it like its your keyboard backlight, not the display backlight. Can someone delete my post? Thanks

Last edited by warmos (2015-12-25 23:44:11)

warmos

Member

Registered: 2014-11-18

Posts: 20

Re: ASUS UX303LB - Display Backlight keyboard shortcut's not working

Does it work using xbacklight?
If not, try acpi_osi=Linux or acpi_osi="!Windows 2012"
What desktop manager you use?
And does xev detect the fn+F5 and fn+F6?

mubster

Member

Registered: 2015-12-23

Posts: 8

Re: ASUS UX303LB - Display Backlight keyboard shortcut's not working

I'm using Cinnamon,
acpi_osi=Linux and acpi_osi="!windows 2012" do not work
xev detects nothing

Xbacklight set, inc and dec commands all work as excepcted.

Just a tidbit, the brightness keys did not work on windows until I installed the intel HD graphics driver, however changing the brightness from a menu worked fine. (that might be normal not sure)

Last edited by mubster (2015-12-26 04:03:32)

warmos

Member

Registered: 2014-11-18

Posts: 20

Re: ASUS UX303LB - Display Backlight keyboard shortcut's not working

im searching google and I have one more question... do you have nvidia installed? or which graphics driver u use?

mubster

Member

Registered: 2015-12-23

Posts: 8

Re: ASUS UX303LB - Display Backlight keyboard shortcut's not working

I have nvidia and intel installed.
I'm using bumblebee atm because i'm rarely going to use the nvidia chip on arch.