Arch Linux

ghostofpacman

Member

Registered: 2012-12-15

Posts: 7

Xbacklight doesn't work, backlight, adjusting brightness

I have been unable to change the brightness of my laptop screen. I tried using xbacklight but it had no effect. When I entered
xbacklight -dec 40
into the terminal, I didn't receive an error, but saw no change in brightness. What are some other ways I can change my brightness?

bgc1954

Member

From: Edmonton, AB, Canada

Registered: 2006-03-14

Posts: 1,160

Re: Xbacklight doesn't work, backlight, adjusting brightness

Are you sure you have the xorg-xbacklight pkg installed.  It works here.

Last edited by bgc1954 (2012-12-18 05:24:12)

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Time is a great teacher, but unfortunately it kills all its pupils ... - Louis Hector Berlioz

rejuvyesh

Member

Registered: 2012-12-01

Posts: 1

Re: Xbacklight doesn't work, backlight, adjusting brightness

Yeah, it doesn't work for me either. Look into your

/sys/class/backlight

There might be more than one folder like acpi_video0, intel_backlight etc.
xbacklight tries changing backlight via acpi_video0. But by manually checking the files inside and echoing different values I found the intel_backlight was the right one for me. So I am using this excellent program Light . It automatically selects the right driver.

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Github+Configs

dront78

Member

From: Moscow

Registered: 2010-11-24

Posts: 47

Re: Xbacklight doesn't work, backlight, adjusting brightness

xbacklight not working for mee
however changing backlight works under root by echo /sys/class/backlight/acpi_video0/brightness