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Questions tagged [xbacklight]

xbacklight - adjust backlight brightness using RandR extension where supported

23
votes
3answers
55k views

xbacklight: No outputs have backlight property - No /sys/class/backlight folder

I installed xbacklight, hoping that it would be able to control my brightness. When trying to change brightness, I was told "No outputs have backlight property". After looking around, I found that ...
35
votes
6answers
52k views

How do I set default display brightness? [duplicate]

Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% ...
2
votes
2answers
803 views

Is it possible to run a command before log in screen?

How can I run: xbacklight -set 0 before login screen?
3
votes
2answers
760 views

Is there an App that can make my desktop dimmer

I used an app in Windows 7, I think called dimmer to make the screen change its contrast settings so I could dim it lower than the controls of the PC defaults such as function key or the power options ...
0
votes
2answers
5k views

i3wm, adjust brightness through command line

I've got a Precision 5510 running Ubuntu 16.10 with kernel 4.8.4. In unity, my function keys for brightness work correctly. But xbacklight commands don't do anything. xbacklight -get comes up empty. ...
0
votes
2answers
2k views

How to execute command with keys?

Like a lot of other users, I have problem with the brightness settings on my laptop. But there is xbacklight which works like a charm. How do I bind xbacklight -dec 10 to Fn+Up? I have tried to use ...