Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [xbacklight]

xbacklight - adjust backlight brightness using RandR extension where supported

0
votes
1answer
50 views

Can't find a way to set the brightness via the terminal

I recently started using a window manager (XMonad) and am enjoying it. The only issue is I have to reconfigure a lot of the the function keys (volume, brightness, etc) to do what they're supposed to ...
0
votes
0answers
21 views

Stuck on boot screen after xbacklight purged

I often dual boot between Ubuntu 18.04 and Windows 10. This last time when I booted back onto Ubuntu I got stuck at the boot screen. This seems to be an nvidia issue, for I am only able to get past ...
0
votes
1answer
205 views

Unable to lower brightness in lenovo legion y530

I have tried various methods found on the internet, including xbacklight . The main issue is I have no folder inside /sys/class/backlight. Usually others happnened to have a folder like ...
1
vote
0answers
72 views

Brightness changes are shown by the indicator but have no effect on the display (Lubuntu, Intel card)

I have tried many of the proposed solutions that I could find on the web, but any of them worked for me. I detail here my problem and some of the things that I tried: Relevant details: TOSHIBA NB200 ...
1
vote
1answer
1k views

How do I turn off backlight of keyboard?

I've tried xset led 3, xset led off, xbacklight -set 00, sudo find /sys/devices/platform/ -name leds returns nothing, so I couldn't try that. sudo find /sys/devices -name leds returns /sys/devices/...
0
votes
0answers
104 views

How to have xbacklight working in Kubuntu 16.04?

xbacklight worked perfectly in Kubuntu 14.04 but now in Kubuntu 16.04, even when it it installed, I only get this message: No outputs have backlight property In my system there is a /sys/class/...
3
votes
0answers
925 views

xbacklight -display XX?

I have two displays. I can successfully set brightness for the first display using e.g. xbacklight -set 30, but I cannot dim my second display connected to HDMI. I tried xbacklight -display HDMI1 -set ...
0
votes
0answers
165 views

I can't turn off backlight after trying many solutions

I have a Samsung N220 modified with a Pixel QI screen. For those of you who don't know Pixel Qi, they make normal LCDs that once the backlight is turned completely off they act as (kind of) e-ink ...
0
votes
2answers
3k views

Adjust brightness from Terminal [duplicate]

I'm trying to edit the brightness of my System76 laptop screen from my window manager i3wm. I've tried the following: xbacklight -dec 10 does nothing sudo vim /sys/class/backlight/intel_backlight/...
0
votes
2answers
4k 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. ...
1
vote
1answer
3k views

Xbacklight won't help to change brightness in lubuntu

I have an old acer laptop with following graphics hardware: 00:02.0 VGA compatible controller [0300]: Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller [8086:8108] (rev 07) ...
0
votes
1answer
986 views

Install xbacklight on Ubuntu 15.04 [closed]

I am trying to install xbacklight using sudo apt-get install -y xbacklight but getting error related to mysql.After running above command a new window pop up to set password for mysql.But after ...
21
votes
3answers
52k 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 ...
0
votes
1answer
153 views

Cron job to set screen brightness not working in ubuntu 14.04

In the terminal, I ran: crontab -e Then I added the following cronjob in the file 26 21 * * * /usr/bin/xbacklight -set 80 This was supposed to set the brightness to 80% at 9:26 PM. But its not ...
0
votes
2answers
461 views

xbacklight works, system settings don't affect

I am running Ubuntu 15.10 x64 on my Dell M4800 with the lvds connected to the Nvidia K2100M via nvidia-355, as the intel card does not support the 3K screen. So when I change the screen brightness ...
3
votes
2answers
754 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 ...
2
votes
0answers
322 views

Mapping xbacklight to brightness keys?

The default method of changing the brightness doesn't work with the NVIDIA drivers, and xbacklight changes it. However, using the default mapper for keyboard shortcuts won't work for setting the F1 ...
0
votes
1answer
2k views

Reduce CPU frequency in battery mode automatically

Is there any way to do that? Something like xbacklight and Cuttlefish
1
vote
1answer
2k views

rc.local not executing command

I was trying to make my laptop running Ubuntu 13.10 remember the brightness from the last time and set it automatically on start-up. I was thinking about using xbacklight to set the brightness. So, as ...
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 ...
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?
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% ...